WordPress Blog Course Design Cookies Tutorial

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Wordpress Blog Course Design Cookies Tutorial

Wordpress Blog Course Design Cookies Tutorial

As the last follow up to … “This WordPress blog could benefit from a directed order of tutorials studied for a particular topic. This may not suit everybody, but it may suit some, and if a system is created that is optional, that can sit on top of what functionality is already there, all the better.” … how about we improve the looks and cookie functionality (panned out that it was best to use cookies to remember the client’s last course viewed) of the WordPress page by which users of this blog can control what order tutorials for a range of subjects or topics could be for Course they design from the list of tutorials at this blog, building on the tutorial of a couple of days ago called WordPress Blog Course Design Looks Tutorial as shown below?

How about we work on the “Course” WordPress “New Page” ( as of a few days ago … as simple as <iframe id="icourse" src="../PHP/design_a_course.php?show=y" width="100%" height="800"></iframe> )) that appears in the top menu that contains up to three parts:

  • new (as of two days ago) optional dropdown up the top that exists if another IP address user has shared any/all of their Course Designs, that you can include in your own IP address user list of Course Designs so that they then show in the next section down as a link (with background image)
  • links (with background images) to previously created courses by any user on the IP address involved (yes, cookie logic introduced today to allow user to go back to last course blog posting undertaken via a new “Last” menu option (on top of the “Course” menu option)) … like a few days back, but as of a couple of days ago there was an improved look, via CSS and PHP
  • an iframe to some PHP which asks the user to optionally create new Course Design for users of the IP address involved … like a few days back, but as of a couple of days ago there was an improved look, via CSS and lots more functionality via PHP

So what changes were needed to the landing page updater? None, but we needed to update the PHP file for the iframe as mentioned above, as below …

… and to handle the cookie logic we need client-side Javascript and HTML as per …

… and there were changes needed for PHP code in wp-content/themes/twentyten/header.php because it establishes the header Javascript and two sections of code are involved …


var ourck=location.search.split('ck=')[1] ? location.search.split('ck=')[1].split('&')[0] : '';
var ourpp=location.search.split('pp=')[1] ? location.search.split('pp=')[1].split('&')[0] : '';
var ourpn=location.search.split('pn=')[1] ? location.search.split('pn=')[1].split('&')[0] : '';
var ourpage=location.search.split('page_id=')[1] ? location.search.split('page_id=')[1].split('&')[0] : '';
var ourp=location.search.split('p=')[1] ? location.search.split('p=')[1].split('&')[0] : '';
var ourcourseurl='';
var ourcoursetitle='';

… at the top just under <script type=’text/javascript’> and …

function topViaDelay() {
parent.scroll(0, 0);
}

function courseCookies() {
if (document.URL.indexOf("#content") != -1) {
setTimeout(topViaDelay, 2000);
} else {
if ((ourpp != "" || ourpn != "") && ourpp != ourp && ourpn != ourp) {
document.getElementById("content").innerHTML = "<iframe width=1 height=1 id='myccor' src='" + document.URL.replace("/wordpress/", "/PHP/coursecookies.html") + "'></iframe>" + document.getElementById("content").innerHTML;
setTimeout(topViaDelay, 2000);
} else {
document.getElementById("content").innerHTML = "<iframe width=1 height=1 id='myccor' src='../PHP/coursecookies.html'></iframe>" + document.getElementById("content").innerHTML;
}
}
}
</script>
</head>

<body onload="courseCookies();" <?php body_class(); ?>>

… around </script>

An idea for a live run could be to look at the WordPress blog’s Newish (menu) Page called “Course”, and note that if you ever follow through, yourself, and ever undertake a course then a cookie will be created so that the next time you visit the blog a new “Last” menu item will be over the usual “Course” menu item to allow you to go to that last Course blog posting you were last visiting however long ago (within last 6 months, I think). Hope the tutorial can help you out in some way.

Stop Press

And then … years later … please read Mac Safari on iPhone Web Browser Debug Tutorial regarding the implications, of Javascript code above, for an iPhone usage scenario.

Previous relevant WordPress Blog Course Design Looks Tutorial is shown below.

Wordpress Blog Course Design Looks Tutorial

Wordpress Blog Course Design Looks Tutorial

As another further follow up to … “This WordPress blog could benefit from a directed order of tutorials studied for a particular topic. This may not suit everybody, but it may suit some, and if a system is created that is optional, that can sit on top of what functionality is already there, all the better.” … how about we improve the looks and functionality of the WordPress page by which users of this blog can control what order tutorials for a range of subjects or topics could be for Course they design from the list of tutorials at this blog, building on yesterday’s WordPress Blog Course Design Page Tutorial as shown below?

How about we work on the “Course” WordPress “New Page” ( as of yesterday … as simple as <iframe id="icourse" src="../PHP/design_a_course.php?show=y" width="100%" height="800"></iframe> )) that appears in the top menu that contains up to three parts:

  • new optional dropdown up the top that exists if another IP address user has shared any/all of their Course Designs, that you can include in your own IP address user list of Course Designs so that they then show in the next section down as a link (with background image)
  • links (with background images) to previously created courses by any user on the IP address involved (no cookies used yet) … like yesterday, but today there is an improved look, via CSS and PHP
  • an iframe to some PHP which asks the user to optionally create new Course Design for users of the IP address involved … like yesterday, but today there is an improved look, via CSS and lots more functionality via PHP

So what changes were needed to the landing page updater? None, but we needed to update the PHP file for the iframe as mentioned above, as below:

An idea for a live run could be to look at the WordPress blog’s Newish (menu) Page called “Course”. Hope the tutorial can help you out in some way.

Previous relevant WordPress Blog Course Design Page Tutorial is shown below.

Wordpress Blog Course Design Page Tutorial

Wordpress Blog Course Design Page Tutorial

As a further follow up to … “This WordPress blog could benefit from a directed order of tutorials studied for a particular topic. This may not suit everybody, but it may suit some, and if a system is created that is optional, that can sit on top of what functionality is already there, all the better.” … how about we set up a WordPress page by which users of this blog can control what order tutorials for a range of subjects or topics could be for Course they design from the list of tutorials at this blog?

How about we create a “Course” WordPress “New Page” ( as simple as <iframe id="icourse" src="../PHP/design_a_course.php?show=y" width="100%" height="800"></iframe> ) that appears in the top menu and it contains two parts:

  • links to previously created courses by any user on the IP address involved (no cookies used yet)
  • an iframe to some PHP which asks the user to optionally create new Course Design for users of the IP address involved

So what changes to the landing page updater are required? None, but we need to create a new PHP file for the iframe as mentioned above, as below:

And did the PHP code in wp-content/themes/twentyten/functions.php off the WordPress Blog’s document root directory need to change … yes, to code so that there is no “Previous link” for the first tutorial of a course and no “Next link” for the last tutorial of a course:


if ( ! function_exists( 'may_be_obsolete' ) ) :
/**
* Truncate unknown previous/next.
*
* @since October 2014 by RJM Programming
*/
function may_be_obsolete($proposed) {
if (strpos($proposed, ">Previous") !== false) {
if (strpos(($proposed . "&"), "&pp=&") !== false) {
$bitsare = explode(">", $proposed);
$nums = explode("=", str_replace("&", "=", str_replace("&pp=", "", str_replace("&pn", "", str_replace("?p=", "", $proposed)))));
if ($nums[0] == $nums[1]) {
$proposed = str_replace($bitsare[sizeof($bitsare) - 1], "", $proposed);
}
}
} else if (strpos($proposed, ">Next") !== false) {
if (strpos(($proposed . "&"), "&pn=&") !== false) {
$bitsare = explode(">", $proposed);
$nums = explode("=", str_replace("&", "=", str_replace("&pn=", "", str_replace("&pp", "", str_replace("?p=", "", $proposed)))));
if ($nums[0] == $nums[1]) {
$proposed = str_replace($bitsare[sizeof($bitsare) - 1], "", $proposed);
}
}
}
return $proposed;
}
endif;

if ( ! function_exists( 'get_other_one' ) ) :
/**
* Get unknown previous/next.
*
* @since October 2014 by RJM Programming
*/
function get_other_one($proposedp, $onetogetprefix, $onep) {

if (file_exists("../PHP/" . $proposedp . "_" . $_SERVER['REMOTE_ADDR'] . ".npg")) {
$prehuh = file_get_contents("../PHP/" . $proposedp . "_" . $_SERVER['REMOTE_ADDR'] . ".npg");
$xxpa = explode(str_replace("&", "", $onetogetprefix), $prehuh);
$xxpaa = explode("&", $xxpa[sizeof($xxpa) - 1]);
return $proposedp . $onetogetprefix . $xxpaa[0];
} else if (file_exists("../PHP/" . $onep . "_" . $_SERVER['REMOTE_ADDR'] . ".npg")) {
$prehuh = file_get_contents("../PHP/" . $onep . "_" . $_SERVER['REMOTE_ADDR'] . ".npg");
$xxpa = explode(str_replace("&", "", $onetogetprefix), $prehuh);
$xxpaa = explode("&", $xxpa[sizeof($xxpa) - 1]);
return $onep . $onetogetprefix . $xxpaa[0];
}

$huh = file_get_contents(dirname(__FILE__) . "/../../../../index.html");
if ($proposedp == "") {
$xxp = explode("?p=" . $onep . "&", $huh);
if (sizeof($xxp) > 1) {
$xxpa = explode(str_replace("&", "", $onetogetprefix), $xxp[1]);
$xxpaa = explode("&", $xxpa[sizeof($xxpa) - 1]);
return $onep . $onetogetprefix . $xxpaa[0];
}
return $onep;
} else {
$xxp = explode("?p=" . $proposedp . "&", $huh);
if (sizeof($xxp) > 1) {
$xxpa = explode(str_replace("&", "", $onetogetprefix), $xxp[1]);
$xxpaa = explode("&", $xxpa[sizeof($xxpa) - 1]);
return $proposedp . $onetogetprefix . $xxpaa[0];
}
return $proposedp;
}
return $proposedp;
}
endif;

if ( ! function_exists( 'get_tutorial_topic' ) ) :
/**
* Get tutorial topic (word).
*
* @since October 2014 by RJM Programming
*/
function get_tutorial_topic($thistopic) {
$words = explode(" ", str_replace(" ", "++", str_replace("~~", "#~", $thistopic)));
if (sizeof($words) > 1) {
return " " . $words[0];
}
return "";
}
endif;

if ( ! function_exists( 'previous_next' ) ) :
/**
* Allow for next and previous via &pn= and &pp= respectively.
*
* @since October 2014 by RJM Programming
*/
function previous_next($both = true) {
if (isset($_GET['pp']) || isset($_GET['pn'])) {

$prefix = " id='atop";
if ($both) $prefix = " id='abottom";
$topic = "";
$tget = "";
if (isset($_GET['title'])) {
$tget = "&title=" . $_GET['title'];

$topic = str_replace("~", " ", get_tutorial_topic(str_replace("_", " ", $_GET['title'])));

} else {

$topic = str_replace("~", " ", get_tutorial_topic($post->title));

}
if (strpos(($_SERVER['QUERY_STRING'] . "&"), "&pp=&pn=&") !== false) {
$prefix = $prefix;
} else {
echo "<table style='width:98%; background-color: #F6F5F1;'><tbody><tr>";
if (isset($_GET['pp'])) {

echo "<th><a" . $prefix . "p' target=_blank title='Previous' href='" . str_replace("?" . $_SERVER['QUERY_STRING'], "", $_SERVER['REQUEST_URI']) . "?p=" . may_be_obsolete(get_other_one($_GET['pp'], "&pp=", $_GET['p']) . "&pn=" . $_GET['p'] . $tget . "'>Previous" . $topic . " Suggestion") . "</a></th>";

}
if (isset($_GET['pn'])) {

echo "<th><a" . $prefix . "n' target=_blank title='Next' href='" . str_replace("?" . $_SERVER['QUERY_STRING'], "", $_SERVER['REQUEST_URI']) . "?p=" . may_be_obsolete(get_other_one($_GET['pn'], "&pn=", $_GET['p']) . "&pp=" . $_GET['p'] . $tget . "'>Next" . $topic . " Suggestion") . "</a><th>";

}

if ($both) {
echo "</tr><tr>";
if (isset($_GET['pp'])) {
echo "<td><iframe src='" . str_replace("?" . $_SERVER['QUERY_STRING'], "", $_SERVER['REQUEST_URI']) . "?p=" . $_GET['pp'] . "#content' width=400 height=800></iframe></td>";
}
if (isset($_GET['pn'])) {
echo "<td><iframe src='" . str_replace("?" . $_SERVER['QUERY_STRING'], "", $_SERVER['REQUEST_URI']) . "?p=" . $_GET['pn'] . "#content' width=400 height=800></iframe></td>";
}
}
echo "</tr></tbody></table>";
}

}

}
endif;

An idea for a live run could be to look at the WordPress blog’s New (menu) Page called “Course”. Hope the tutorial is of some interest for you, and see you later.

Previous relevant WordPress Blog Course Design Database Tutorial is shown below.

Wordpress Blog Course Design Database Tutorial

Wordpress Blog Course Design Database Tutorial

As another follow up to … “This WordPress blog could benefit from a directed order of tutorials studied for a particular topic. This may not suit everybody, but it may suit some, and if a system is created that is optional, that can sit on top of what functionality is already there, all the better.” … how about we set up a WordPress database means by which the the administrator of this blog can control what order tutorials for a range of subjects or topics could be?

How about we allow for the WordPress MySql wp_posts table’s post_excerpt field be used to contain either …

  • a degree of difficulty numerical rating
  • the query string parts &pp=[blog id of previous blog post of interest to current one] and &pn=[blog id of next blog post of interest to current one]&title=[blog posting title]

… because the post_excerpt database column is currently not being utilized, and is easier to implement than WordPress custom fields.

So what changes to the landing page updater are required? For the background to it please read the blog posting called Extended Linux Crontab Curl Tutorial would hold the answer to where the most efficient solution to this lies, in adjusting the PHP code called tutorial_options.php here as below:

And did the PHP code in wp-content/themes/twentyten/functions.php off the WordPress Blog’s document root directory need to change … do fish swim? … see the bits in bold, in particular below:


if ( ! function_exists( 'get_other_one' ) ) :
/**
* Get unknown previous/next.
*
* @since October 2014 by RJM Programming
*/
function get_other_one($proposedp, $onetogetprefix, $onep) {
$huh = file_get_contents(dirname(__FILE__) . "/../../../../index.html");
if ($proposedp == "") {
$xxp = explode("?p=" . $onep . "&", $huh);
if (sizeof($xxp) > 1) {
$xxpa = explode(str_replace("&", "", $onetogetprefix), $xxp[1]);
$xxpaa = explode("&", $xxpa[sizeof($xxpa) - 1]);
return $onep . $onetogetprefix . $xxpaa[0];
}
return $onep;
} else {
$xxp = explode("?p=" . $proposedp . "&", $huh);
if (sizeof($xxp) > 1) {
$xxpa = explode(str_replace("&", "", $onetogetprefix), $xxp[1]);
$xxpaa = explode("&", $xxpa[sizeof($xxpa) - 1]);
return $proposedp . $onetogetprefix . $xxpaa[0];
}
return $proposedp;
}
return $proposedp;
}
endif;

if ( ! function_exists( 'get_tutorial_topic' ) ) :
/**
* Get tutorial topic (word).
*
* @since October 2014 by RJM Programming
*/
function get_tutorial_topic($thistopic) {
$words = explode(" ", str_replace(" ", "++", str_replace("~~", "#~", $thistopic)));
if (sizeof($words) > 1) {
return " " . $words[0];
}
return "";
}
endif;

if ( ! function_exists( 'previous_next' ) ) :
/**
* Allow for next and previous via &pn= and &pp= respectively.
*
* @since October 2014 by RJM Programming
*/
function previous_next($both = true) {
if (isset($_GET['pp']) || isset($_GET['pn'])) {

$prefix = " id='atop";
if ($both) $prefix = " id='abottom";
$topic = "";
$tget = "";
if (isset($_GET['title'])) {
$tget = "&title=" . $_GET['title'];

$topic = str_replace("~", " ", get_tutorial_topic(str_replace("_", " ", $_GET['title'])));

} else {

$topic = str_replace("~", " ", get_tutorial_topic($post->title));

}
if (strpos(($_SERVER['QUERY_STRING'] . "&"), "&pp=&pn=&") !== false) {
$prefix = $prefix;
} else {
echo "<table style='width:98%; background-color: #F6F5F1;'><tbody><tr>";
if (isset($_GET['pp'])) {

echo "<th><a" . $prefix . "p' target=_blank title='Previous' href='" . str_replace("?" . $_SERVER['QUERY_STRING'], "", $_SERVER['REQUEST_URI']) . "?p=" . get_other_one($_GET['pp'], "&pp=", $_GET['p']) . "&pn=" . $_GET['p'] . $tget . "'>Previous" . $topic . " Suggestion</a></th>";

}
if (isset($_GET['pn'])) {

echo "<th><a" . $prefix . "n' target=_blank title='Next' href='" . str_replace("?" . $_SERVER['QUERY_STRING'], "", $_SERVER['REQUEST_URI']) . "?p=" . get_other_one($_GET['pn'], "&pn=", $_GET['p']) . "&pp=" . $_GET['p'] . $tget . "'>Next" . $topic . " Suggestion</a><th>";

}

if ($both) {
echo "</tr><tr>";
if (isset($_GET['pp'])) {
echo "<td><iframe src='" . str_replace("?" . $_SERVER['QUERY_STRING'], "", $_SERVER['REQUEST_URI']) . "?p=" . $_GET['pp'] . "#content' width=400 height=800></iframe></td>";
}
if (isset($_GET['pn'])) {
echo "<td><iframe src='" . str_replace("?" . $_SERVER['QUERY_STRING'], "", $_SERVER['REQUEST_URI']) . "?p=" . $_GET['pn'] . "#content' width=400 height=800></iframe></td>";
}
}
echo "</tr></tbody></table>";
}

}

}
endif;

… and you may want to compare this to the code of the previous WordPress Blog Course Design Follow Up Tutorial as shown below. Today’s explanation of a “live run” is to:

  1. Access the rjmprogramming.com.au domain Landing Page
  2. At the tutorial dropdown you’ll see the 3 blog postings that had their post_excerpt fields filled out up the top and you could “motor” down to the second one dated 20130722 … these are blog posts flagged as part of a course in the order from start of course through to end of course where the Course name is the first word of the blog posting title as shown on the dropdown (so you can tell where one course starts and the next starts)
  3. Hopefully … voila (as per live run as was the “live run” from tutorial way below + a Course name inclusion functionality improvement so that it is like … live run again) … do the same for 20141006 (today’s) and you don’t get the new functionality, but hopefully it doesn’t cause any bugs (as you change code the top priority should be firstly not to break other parts that used to work, and to proceed successfully with new functionality that works)

By the way, the file methodologies of the tutorial below are still active, and we still have to explain how a user can control their own personalized Course Designs, and this file method will come back to the fore then, am pretty sure.

Hope to see you yet again next time.

Previous relevant WordPress Blog Course Design Follow Up Tutorial is shown below.

Wordpress Blog Course Design Follow Up Tutorial

Wordpress Blog Course Design Follow Up Tutorial

As a follow up to … “This WordPress blog could benefit from a directed order of tutorials studied for a particular topic. This may not suit everybody, but it may suit some, and if a system is created that is optional, that can sit on top of what functionality is already there, all the better.” … how about we set up the means by which the user or the administrator of this blog (I knew it) can control what order tutorials for a range of subjects or topics could be?

If you’re designing this (and please don’t get any ideas that there is just the way suggested here) you set a “get parameters” way to express the fact that you want this “guided” Course Design help but don’t know what is a good tutorial to come before nor after, and what logic paths, in order …

  1. accept last recorded &pp=[blog id of previous blog post of interest to current one] and &pn=[blog id of next blog post of interest to current one] advice for this current blog posting from this user (ie. use cookies)
  2. accept last recorded &pp=[blog id of previous blog post of interest to current one] and &pn=[blog id of next blog post of interest to current one] advice for this current blog posting from this client using their IP address
  3. accept last recorded &pp=[blog id of previous blog post of interest to current one] and &pn=[blog id of next blog post of interest to current one] advice for this current blog posting from the administrator of this blog
  4. accept last recorded &pp=[blog id of previous blog post to current one] and &pn=[blog id of next blog post to current one]
  5. disregard display of previous and next suggested tutorials

… to follow in order to come up with the blog posting display that you end up with.

Let’s just first concentrate on options 3 and 4 and 5 above … how about we use &pp=&pn= to mean that if no previous and/or next tutorial information is found anywhere you should (5) “disregard display of previous and next suggested tutorials”, whereas if you specify &pn=&pp= to mean that if no previous and/or next tutorial information is found anywhere you should (4) “accept last recorded &pp=[blog id of previous blog post to current one] and &pn=[blog id of next blog post to current one]”.

This sounds a silly detail to worry about, but the fact is, if this detail is sorted out, this whole “guided” Course Design system can be automated from this domain’s landing page‘s tutorial dropdown, or any other dropdown you want to design to direct people to this WordPress Blog’s tutorials.

And where could we intervene to fix this up? Well, well, well (three holes in the ground … chortle, chortle) … you’d have to be an avid follower of this blog to remember, but the blog posting called Extended Linux Crontab Curl Tutorial would hold the answer to where the most efficient solution to this lies, in adjusting the PHP code called tutorial_options.php here as below …

… to enable an ID= on the links to allow for future Javascript DOM possibilities and a file arrangement for admin and/or IP user based tailoring of previous and/or next blog posting “get” parameters. Future tutorials on this “theme” will look at functionality to maintain and populate these files in a sensible way.

Another question occurs to me. Shouldn’t the name of the proposed Course a blog posting belongs to be part of the display? No, I wouldn’t do that! “Yeah, but who asked you? You’re a cat, remember?” No furry beastings were hurt during the creation of this blog posting.

Is the name of the Course a thing that the Course Designer should designate, or can it be derived from the WordPress blog? This will vary in people’s outlook. Some will be fine for (one of) the WordPress blog posting Category (or Tag?) (names) to suffice, and think I’d be in that camp. But I’m also in the camp that says this could be overridden by a user or administrator defined method … feel a “get parameter” coming on … so let’s see what the adjusted code for the “framework” of these new requirements looks like (the tutorial_options.php needed adjustment for this concept as well) … it panned out to be better to focus on the first word of the blog posting’s title as a better bet for what the Course name could be derived from … the PHP code (snippet) goes into wp-content/themes/twentyten/functions.php off the WordPress Blog’s document root directory …



if ( ! function_exists( 'get_tutorial_topic' ) ) :
/**
* Get tutorial topic (word).
*
* @since October 2014 by RJM Programming
*/
function get_tutorial_topic($thistopic) {
$words = explode(" ", str_replace(" ", "++", str_replace("~~", "#~", $thistopic)));
if (sizeof($words) > 1) {
return " " . $words[0];
}
return "";
}
endif;

if ( ! function_exists( 'previous_next' ) ) :
/**
* Allow for next and previous via &pn= and &pp= respectively.
*
* @since October 2014 by RJM Programming
*/
function previous_next($both = true) {
if (isset($_GET['pp']) || isset($_GET['pn'])) {

$prefix = " id='atop";
if ($both) $prefix = " id='abottom";
$topic = "";
$tget = "";
if (isset($_GET['title'])) {
$tget = "&title=" . $_GET['title'];
$topic = get_tutorial_topic(str_replace("_", " ", $_GET['title']));
} else {
$topic = get_tutorial_topic($post->title);
}
if (strpos(($_SERVER['QUERY_STRING'] . "&"), "&pp=&pn=&") !== false) {
$prefix = $prefix;
} else {
echo "<table style='width:98%; background-color: #F6F5F1;'><tbody><tr>";
if (isset($_GET['pp'])) {
echo "<th><a" . $prefix . "p' target=_blank title='Previous' href='" . str_replace("?" . $_SERVER['QUERY_STRING'], "", $_SERVER['REQUEST_URI']) . "?p=" . $_GET['pp'] . "&pn=" . $_GET['p'] . $tget . "'>Previous" . $topic . " Suggestion</a></th>";
}
if (isset($_GET['pn'])) {
echo "<th><a" . $prefix . "n' target=_blank title='Next' href='" . str_replace("?" . $_SERVER['QUERY_STRING'], "", $_SERVER['REQUEST_URI']) . "?p=" . $_GET['pn'] . "&pp=" . $_GET['p'] . $tget . "'>Next" . $topic . " Suggestion</a><th>";
}

if ($both) {
echo "</tr><tr>";
if (isset($_GET['pp'])) {
echo "<td><iframe src='" . str_replace("?" . $_SERVER['QUERY_STRING'], "", $_SERVER['REQUEST_URI']) . "?p=" . $_GET['pp'] . "#content' width=400 height=800></iframe></td>";
}
if (isset($_GET['pn'])) {
echo "<td><iframe src='" . str_replace("?" . $_SERVER['QUERY_STRING'], "", $_SERVER['REQUEST_URI']) . "?p=" . $_GET['pn'] . "#content' width=400 height=800></iframe></td>";
}
}
echo "</tr></tbody></table>";
}

}

}
endif;

… and you may want to compare this to the code of the previous WordPress Blog Course Design Primer Tutorial as shown below. Today’s explanation of a “live run” is to:

  1. Access the rjmprogramming.com.au domain Landing Page
  2. At the tutorial dropdown “motor” down to the tutorial at 20130722 … OOPs (chortle, chortle) … and choose this
  3. Hopefully … voila (as per live run as was the “live run” from tutorial below + a Course name inclusion functionality improvement so that it is like … live run again) … do the same for 20141006 (today’s) and you don’t get the new functionality, but hopefully it doesn’t cause any bugs (as you change code the top priority should be firstly not to break other parts that used to work, and to proceed successfully with new functionality that works)

Hope to see you again next time.

Previous relevant WordPress Blog Course Design Primer Tutorial is shown below.

Wordpress Blog Course Design Primer Tutorial

Wordpress Blog Course Design Primer Tutorial

This WordPress blog could benefit from a directed order of tutorials studied for a particular topic. This may not suit everybody, but it may suit some, and if a system is created that is optional, that can sit on top of what functionality is already there, all the better.

When you want to add PHP (or HTML, for that matter) functionality, with web work, I personally find the get parameters useful, and this is usually fine as long as the data required of this functionality …

  • is not too long
  • is not sensitive (ie. not a password or username)

… otherwise it is better to use post parameters or a database or a file arrangement of some sort.

Step one in our Course Design ideas is to introduce two new ideas with two new get parameters, so that:

  • &pp=[blog id of previous blog post of interest to current one]
  • &pn=[blog id of next blog post of interest to current one]

Here’s a first draft of a PHP snippet of code to use (though over time it may change):


if ( ! function_exists( 'previous_next' ) ) :
/**
* Allow for next and previous via &pn= and &pp= respectively.
*
* @since October 2014 by RJM Programming
*/
function previous_next($both = true) {
if (isset($_GET['pp']) || isset($_GET['pn'])) {
echo "<table style='width:98%; background-color: #F6F5F1;'><tbody><tr>";
if (isset($_GET['pp'])) {
echo "<th><a target=_blank title='Previous' href='" . str_replace("?" . $_SERVER['QUERY_STRING'], "", $_SERVER['REQUEST_URI']) . "?p=" . $_GET['pp'] . "&pn=" . $_GET['p'] . "'>Previous Suggestion</a></th>";
}
if (isset($_GET['pn'])) {
echo "<th><a target=_blank title='Next' href='" . str_replace("?" . $_SERVER['QUERY_STRING'], "", $_SERVER['REQUEST_URI']) . "?p=" . $_GET['pn'] . "&pp=" . $_GET['p'] . "'>Next Suggestion</a><th>";
}
if ($both) {
echo "</tr><tr>";
if (isset($_GET['pp'])) {
echo "<td><iframe src='" . str_replace("?" . $_SERVER['QUERY_STRING'], "", $_SERVER['REQUEST_URI']) . "?p=" . $_GET['pp'] . "#content' width=400 height=800></iframe></td>";
}
if (isset($_GET['pn'])) {
echo "<td><iframe src='" . str_replace("?" . $_SERVER['QUERY_STRING'], "", $_SERVER['REQUEST_URI']) . "?p=" . $_GET['pn'] . "#content' width=400 height=800></iframe></td>";
}
}
echo "</tr></tbody></table>";
}
}
endif;

So where does the code above belong in the WordPress source code? Well, for the TwentyOne theme of this blog, the answer is wp-content/themes/twentyten/functions.php off the WordPress Blog’s document root directory (where PHP functions go, generally).

And the plan will be to call it, for the top and bottom of current posting respectively:

  • <?php previous_next(false); ?>
  • <?php previous_next(true); ?>

So where does this code go? Well, for the TwentyOne theme of this blog, the answer is, in WordPress terminology, in The Loop, for the particular scenario, and the scenario here is the display of a single WordPress Blog posting, as typically happens via the Search Engine links or relevant dropdown links within this rjmprogramming.com.au domain … and this pans out to be within wp-content/themes/twentyten/single.php off the WordPress Blog’s document root directory … after these two lines of PHP code respectively …

  • <?php if ( have_posts() ) while ( have_posts() ) : the_post(); ?>
  • <?php endwhile; // end of the loop. ?>

… for these two looks respectively …

Try an example of a live run of the use of this new functionality here at this WordPress Blog … but there is more to do … and we will visit these other “things to do” over time … thanks for visiting … bye for now.

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