{"id":63794,"date":"2024-06-04T03:01:24","date_gmt":"2024-06-03T17:01:24","guid":{"rendered":"http:\/\/www.rjmprogramming.com.au\/ITblog\/?p=63794"},"modified":"2024-06-04T09:46:45","modified_gmt":"2024-06-03T23:46:45","slug":"animated-gif-creation-data-limits-via-slide-extraction-tutorial","status":"publish","type":"post","link":"https:\/\/www.rjmprogramming.com.au\/ITblog\/animated-gif-creation-data-limits-via-slide-extraction-tutorial\/","title":{"rendered":"Animated GIF Creation Data Limits via Slide Extraction Tutorial"},"content":{"rendered":"
\"Animated<\/a>

Animated GIF Creation Data Limits via Slide Extraction Tutorial<\/p><\/div>\n

Even PHP’s $_POST[]<\/a> approach to HTML form navigation data sharing has it’s limits, and that can be challenged when considering a whole set of data-URI defined animated GIF slide images.<\/p>\n

But, behind the scenes, when $_POST[] does not get filled out with regard to the data limits of the Apache\/PHP\/MySql (in our case) web server involved, there is still php:\/\/input<\/i><\/a> …<\/p>\n

\nPHP provides a number of miscellaneous I\/O streams that allow access to PHP’s own input and output streams, the standard input, output and error file descriptors, in-memory and disk-backed temporary file streams, and filters that can manipulate other file resources as they are read from and written to.
\n
\nphp:\/\/stdin, php:\/\/stdout and php:\/\/stderr \u00b6
\nphp:\/\/stdin, php:\/\/stdout and php:\/\/stderr allow direct access to the corresponding input or output stream of the PHP process. The stream references a duplicate file descriptor, so if you open php:\/\/stdin and later close it, you close only your copy of the descriptor-the actual stream referenced by STDIN is unaffected. It is recommended that you simply use the constants STDIN, STDOUT and STDERR instead of manually opening streams using these wrappers.
\n
\nphp:\/\/stdin is read-only, whereas php:\/\/stdout and php:\/\/stderr are write-only.\n<\/p><\/blockquote>\n

… we can turn to (thanks, PHP<\/a>), that can save the day in a lot of these scenarios.<\/p>\n

The thing is, which our parent HTML and Javascript can help with, we want to be flagging the scenario where we should be checking that php:\/\/input<\/i> usage might be coming into play. Well, even for an HTML form method=POST action=[ourRelevantPHP] scenario, the PHP global $_SERVER[‘QUERY_STRING’]<\/a> is honoured, shall we say (separate to any $_GET[]<\/a> ideas, is what we are getting at here). So we can, at the client HTML and Javascript parent (and client) end, set a unique $_SERVER[‘QUERY_STRING’] condition to test for<\/font> in a changed<\/a> sixth draft extract_ag_slide_huh_of.html<\/a> Animated GIF Slide Extraction web application<\/a> (or Animated GIF Slide Extraction via User Interaction web application<\/a> version), which you can try below<\/a>, nuancing yesterday’s Animated GIF Creation Interfacing via Slide Extraction Tutorial<\/a> …<\/p>\n


\n<form id=agf style=display:none; method=POST data-target=ifconto action='\/PHP\/animegif\/tutorial_to_animated_gif.php?theword=numfillin<\/font>'>
\n<\/form>
\n<\/code><\/p>\n

… and then, up at that “[ourRelevantPHP]” changed<\/a> PHP tutorial_to_animated_gif.php<\/a> inhouse animated GIF creator web application<\/a> we can test as per<\/font> …<\/p>\n

<?php
\n
\nif (strpos(('' . $_SERVER['QUERY_STRING']), '=numfillin') !== false && !isset($_POST['numfillin']) && !isset($_GET['numfillin'])) {
\n $fp = fopen(\"php:\/\/input\", \"r\");
\n $post = \"\" . file_get_contents(\"php:\/\/input\");
\n fclose($fp);
\n $prefdelim='?';
\n $pairings=[];
\n \/\/file_put_contents('yes.yes', substr($post,0,300));
\n if (strpos($post, '=') !== false && strpos($post, '?') === false) {
\n $pairings=explode('=', ('?' . $post));
\n } else if (strpos($post, '=') !== false) {
\n $pairings=explode('=', ('' . $post));
\n }
\n if (strpos($post, '=') !== false) { \/\/ && strpos($post, '?') !== false) {
\n $post='';
\n \/\/file_put_contents('yesagain.yes', '' . sizeof($pairings));
\n for ($ipairings=1; $ipairings<sizeof($pairings); $ipairings++) {
\n $thisval=explode('&', $pairings[$ipairings])[0];
\n $thisname=explode($prefdelim, $pairings[-1 + $ipairings])[1];
\n if (strpos(('~' . $thisval), '~data') !== false) {
\n $_POST[$thisname]=$thisval;
\n } else {
\n $_POST[$thisname]=$thisval;
\n }
\n if (strpos($thisname, 'slideshow') !== false) {
\n \/\/file_put_contents('yes_yet_again.yes', '' . $thisname . ' ' . strlen($thisval));
\n }
\n \/\/file_put_contents('yes_again.yes', '' . $thisname . ' ' . strlen($thisval));
\n $prefdelim='&';
\n }
\n $pairings=[];
\n }
\n}
\n$post='';
\n<\/font>
\nif (isset($_GET['numfillin'])) { $numfillin=$_GET['numfillin']; }
\nif (isset($_POST['numfillin'])) { $numfillin=$_POST['numfillin']; }
\n
\n$nonplus=' ';
\n$theplus='+';
\nif ($numfillin >= 2) {
\n if (isset($_GET['numfillin'])) {
\n $numfillin=$_GET['numfillin'];
\n if (isset($_GET['slideshow'])) {
\n if (str_replace('+',' ',substr(urldecode($_GET['slideshow']),0,1)) == ' ') { $theplus=' '; $nonplus='+'; }
\n $preurl=str_replace($nonplus,$theplus,urldecode($_GET['slideshow']));
\n }
\n$nonplus=' ';
\n$theplus='+';
\n if (isset($_GET['slideshow2'])) {
\n if (str_replace('+',' ',substr(urldecode($_GET['slideshow2']),0,1)) == ' ') { $theplus=' '; $nonplus='+'; }
\n $bigfillin=str_replace(' value=\"\"',' value=\"' . str_replace($nonplus,$theplus,urldecode($_GET['slideshow2'])) . '\"',$twopattern);
\n } else {
\n $bigfillin=$twopattern;
\n }
\n } else if (isset($_POST['numfillin'])) {
\n $numfillin=$_POST['numfillin'];
\n if (isset($_POST['slideshow'])) {
\n \/\/file_put_contents('yes_slideshow_again.yes', '' . $numfillin);
\n if (str_replace('+',' ',substr(urldecode($_POST['slideshow']),0,1)) == ' ') { $theplus=' '; $nonplus='+'; }
\n $preurl=str_replace($nonplus,$theplus,urldecode($_POST['slideshow']));
\n }
\n if (isset($_POST['slideshow2'])) {
\n \/\/file_put_contents('yes_slideshow2_again.yes', '' . $numfillin);
\n if (str_replace('+',' ',substr(urldecode($_POST['slideshow2']),0,1)) == ' ') { $theplus=' '; $nonplus='+'; }
\n $bigfillin=str_replace(' value=\"\"',' value=\"' . str_replace($nonplus,$theplus,urldecode($_POST['slideshow2'])) . '\"',$twopattern);
\n } else {
\n $bigfillin=$twopattern;
\n }
\n }
\n$nonplus=' ';
\n$theplus='+';
\n for ($ijh=3; $ijh<=$numfillin; $ijh++) {
\n $pretwopattern='<div id=\"fdiv' . $ijh . '\">';
\n if (isset($_GET['slideshow' . $ijh])) {
\n if (str_replace('+',' ',substr(urldecode($_GET['slideshow' . $ijh]),0,1)) == ' ') { $theplus=' '; $nonplus='+'; }
\n $bigfillin=str_replace('<div id=\"fdiv' . (-1 + $ijh) . '\"><\/div>', '<div id=\"fdiv' . (-1 + $ijh). '\">' . $pretwopattern . str_replace(' value=\"\"',' value=\"' . str_replace($nonplus,$theplus,urldecode($_GET['slideshow' . $ijh])) . '\"',str_replace('slideshow2\"', 'slideshow' . $ijh . '\"', str_replace('<div id=\"fdiv2\"', '<div id=\"fdiv' . $ijh . '\"', str_replace('>2<', '>' . $ijh . '<', str_replace('ours2', 'ours' . $ijh, $twopattern))))) . $posttwopattern . '<\/div>', $bigfillin);
\n } else if (isset($_POST['slideshow' . $ijh])) {
\n \/\/file_put_contents('yes_slideshow' . $ijh . '_again.yes', '' . $numfillin);
\n if (str_replace('+',' ',substr(urldecode($_POST['slideshow' . $ijh]),0,1)) == ' ') { $theplus=' '; $nonplus='+'; }
\n $bigfillin=str_replace('<div id=\"fdiv' . (-1 + $ijh) . '\"><\/div>', '<div id=\"fdiv' . (-1 + $ijh). '\">' . $pretwopattern . str_replace(' value=\"\"',' value=\"' . str_replace($nonplus,$theplus,urldecode($_POST['slideshow' . $ijh])) . '\"',str_replace('slideshow2\"', 'slideshow' . $ijh . '\"', str_replace('<div id=\"fdiv2\"', '<div id=\"fdiv' . $ijh . '\"', str_replace('>2<', '>' . $ijh . '<', str_replace('ours2', 'ours' . $ijh, $twopattern))))) . $posttwopattern . '<\/div>', $bigfillin);
\n } else {
\n $bigfillin=str_replace('<div id=\"fdiv' . (-1 + $ijh) . '\"><\/div>', '<div id=\"fdiv' . (-1 + $ijh). '\">' . $pretwopattern . str_replace('slideshow2\"', 'slideshow' . $ijh . '\"', str_replace('<div id=\"fdiv2\"', '<div id=\"fdiv' . $ijh . '\"', str_replace('>2<', '>' . $ijh . '<', str_replace('ours2', 'ours' . $ijh, $twopattern)))) . $posttwopattern . '<\/div>', $bigfillin);
\n }
\n$nonplus=' ';
\n$theplus='+';
\n if ($ijh == $numfillin) {
\n $ijh++;
\n $bigfillin=str_replace('<div id=\"fdiv' . (-1 + $ijh) . '\"><\/div>', '<div id=\"fdiv' . (-1 + $ijh). '\">' . $pretwopattern . str_replace('slideshow2\"', 'slideshow' . $ijh . '\"', str_replace('<div id=\"fdiv2\"', '<div id=\"fdiv' . $ijh . '\"', str_replace('>2<', '>' . $ijh . '<', str_replace('ours2', 'ours' . $ijh, $twopattern)))) . $posttwopattern . '<\/div>', $bigfillin);
\n }
\n }
\n}
\n<\/code>
\n?><\/p>\n

… to cater for more scenarios, we’re hoping!<\/p>\n

\n

\n

Previous relevant Animated GIF Creation Interfacing via Slide Extraction Tutorial<\/a> is shown below.<\/p>\n

\"Animated<\/a>

Animated GIF Creation Interfacing via Slide Extraction Tutorial<\/p><\/div>\n

The work of today combines …<\/p>\n