note 130364 added to function.highlight-string

Function highlight_string() in its pure form is IMHO rather messy. But it can be easily made tidy and more handy with minor changes and CSS use: ● Line numbers of code (based on HTML <ol> & <li>, so they don't mess selecting code) ● Optional loading code from a file ● Tidy code: ● Replacing style attributes with use of CSS classes ● Removing unnecessary tags ● Countless &nbsp; to spaces (CSS handles that) etc. <?php /** * Code syntax highlighting * * @version 2025.06.12 * @author Walerian Walawski * @link https://w87.eu/ * * @param string|null $file — path of a file to load or null to use OB */ function w87HighlightCode($file = null) { static $w87HighlightCodeOn = false; ini_set('highlight.comment', 'comment'); ini_set('highlight.default', 'default'); ini_set('highlight.html', 'html'); ini_set('highlight.keyword', 'keyword'); ini_set('highlight.string', 'string'); if(!$file && !$w87HighlightCodeOn){ ob_start(); $w87HighlightCodeOn = true; }else{ $code = highlight_string(trim($file ? file_get_contents($file) : "<?php\n".ob_get_contents()."\n?>"), true); $code = preg_replace(["|^\\<code\\>\\<span style\\=\"color\\: (.+){2,24}\"\\>|", "|\\</code\\>\$|", "|\\</span\\>\$|"], '', trim($code), 1); $code = str_replace([' style="color: ', '<br />', '&nbsp;'], [' class="w87-hc-', '</li><li>', ' '], trim($code)); if(!$file) ob_end_clean(); $w87HighlightCodeOn = false; return '<ol class="w87-hc-lines"><li>'.$code.'</li></ol>'; } } /** ----------------------------------------------------------------------------- * Use the function above with the CSS included in your styles file or in <head>: * ------------------------------------------------------------------------------ <style> .w87-hc-lines{background:#06121F;color:#FFFFFF; font-family:monospace;white-space:pre-wrap;word-wrap:break-word;padding:4px 6px;margin:-2px 0 4px 45px;line-height:18px;} .w87-hc-lines li{background:#09192B;padding:1px 0 0 5px;font-family:Monospace;} .w87-hc-lines li:nth-child(odd){background:#112233;} .w87-hc-comment{color: #FFAA00;} .w87-hc-default{color: #AAFF00;} .w87-hc-html{color: #00EEFF;} .w87-hc-keyword{color: #FF2277; font-weight: bold;} .w87-hc-string{color: #FFFFFF;} </style> */ ?> Using to highlight code in a file: <?php echo w87HighlightCode(__DIR__.'/fileName.php'); ?> Using with output buffering for handy embedding code: <?php echo '<h3>This is a test code example</h3>'; w87HighlightCode(); ?> echo "Now 'quetes' and $other \n $special chars. don't require 'escaping'!"; <?php echo w87HighlightCode(); ?> ---- Server IP: 45.112.84.4 Probable Submitter: 80.90.5.137 (proxied: 89.234.212.36) ---- Manual Page -- https://php.net/manual/en/function.highlight-string.php Edit -- https://main.php.net/note/edit/130364 Del: integrated -- https://main.php.net/note/delete/130364/integrated Del: useless -- https://main.php.net/note/delete/130364/useless Del: bad code -- https://main.php.net/note/delete/130364/bad+code Del: spam -- https://main.php.net/note/delete/130364/spam Del: non-english -- https://main.php.net/note/delete/130364/non-english Del: in docs -- https://main.php.net/note/delete/130364/in+docs Del: other reasons-- https://main.php.net/note/delete/130364 Reject -- https://main.php.net/note/reject/130364 Search -- https://main.php.net/manage/user-notes.php