note 90759 added to function.print-r

Here is a function that formats the output of print_r as a expandable/collapsable tree list using HTML and JavaScript. <?php function print_r_tree($data) { // capture the output of print_r $out = print_r($data, true); // replace something like '[element] => <newline> (' with <a href="javascript:toggleDisplay('...');">...</a><div id="..." style="display: none;"> $out = preg_replace('/([ \t]*)(\[[^\]]+\][ \t]*\=\>[ \t]*[a-z0-9 \t_]+)\n[ \t]*\(/iUe',"'\\1<a href=\"javascript:toggleDisplay(\''.(\$id = substr(md5(rand().'\\0'), 0, 7)).'\');\">\\2</a><div id=\"'.\$id.'\" style=\"display: none;\">'", $out); // replace ')' on its own on a new line (surrounded by whitespace is ok) with '</div> $out = preg_replace('/^\s*\)\s*$/m', '</div>', $out); // print the javascript function toggleDisplay() and then the transformed output echo '<script language="Javascript">function toggleDisplay(id) { document.getElementById(id).style.display = (document.getElementById(id).style.display == "block") ? "none" : "block"; }</script>'."\n$out"; } ?> Pass it a multidimensional array or object and each sub-array/object will be hidden and replaced by a html link that will toggle its display on and off. Its quick and dirty, but great for debugging the contents of large arrays and objects. Note: You'll want to surround the output with <pre></pre> ---- Server IP: 117.104.162.229 Probable Submitter: 58.96.44.86 (proxied: 58.96.44.86) ---- Manual Page -- http://www.php.net/manual/en/function.print-r.php Edit -- https://master.php.net/note/edit/90759 Del: integrated -- https://master.php.net/note/delete/90759/integrated Del: useless -- https://master.php.net/note/delete/90759/useless Del: bad code -- https://master.php.net/note/delete/90759/bad+code Del: spam -- https://master.php.net/note/delete/90759/spam Del: non-english -- https://master.php.net/note/delete/90759/non-english Del: in docs -- https://master.php.net/note/delete/90759/in+docs Del: other reasons-- https://master.php.net/note/delete/90759 Reject -- https://master.php.net/note/reject/90759 Search -- https://master.php.net/manage/user-notes.php