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  1. <?php
  2. //built with help from the amazing people on stackoverflow
  3. //http://stackoverflow.com/questions/17928427/regular-expression-to-not-match-something-in-quotes/17928889
  4.  
  5. /////////////////////////////////////////////////////////////////////
  6. $contents = 'img[style*="float: left"]
  7. img: [style*="float: left"]
  8. img( [style*="float: left"]';
  9. echo drupal_load_stylesheet_content($contents, TRUE);
  10. ////////////////////////////////////////////////////////////////////
  11.  
  12.  
  13. function drupal_load_stylesheet_content($contents, $optimize = FALSE) {
  14.   // Remove multiple charset declarations for standards compliance (and fixing Safari problems).
  15.   $contents = preg_replace('/^@charset\s+[\'"](\S*)\b[\'"];/i', '', $contents);
  16.  
  17.   if ($optimize) {
  18.     // Perform some safe CSS optimizations.
  19.     // Regexp to match comment blocks.
  20.     $comment     = '/\*[^*]*\*+(?:[^/*][^*]*\*+)*/';
  21.     // Regexp to match double quoted strings.
  22.     $double_quot = '"[^"\\\\]*(?:\\\\.[^"\\\\]*)*"';
  23.     // Regexp to match single quoted strings.
  24.     $single_quot = "'[^'\\\\]*(?:\\\\.[^'\\\\]*)*'";
  25.     // Strip all comment blocks, but keep double/single quoted strings.
  26.     $contents = preg_replace(
  27.       "<($double_quot|$single_quot)|$comment>Ss",
  28.       "$1",
  29.       $contents
  30.     );
  31.     // Remove certain whitespace.
  32.     // There are different conditions for removing leading and trailing
  33.     // whitespace.
  34.     // @see http://p...content-available-to-author-only...p.net/manual/en/regexp.reference.subpatterns.php
  35.     $contents = preg_replace('<
  36.       # Strip leading and trailing whitespace.
  37.         \s*([@{};,])\s*
  38.       # Strip only leading whitespace from:
  39.       # - Closing parenthesis: Retain "@media (bar) and foo".
  40.       | \s+([\)])
  41.       # Strip only trailing whitespace from:
  42.       # - Opening parenthesis: Retain "@media (bar) and foo".
  43.       | ([\(])\s+
  44.     >xS',
  45.       // Only one of the three capturing groups will match, so its reference
  46.       // will contain the wanted value and the references for the
  47.       // two non-matching groups will be replaced with empty strings.
  48.       '$1$2$3',
  49.       $contents
  50.     );
  51.  
  52.     //Strip only trailing whitespace from colons unless that colon appears within double quotes
  53.     $contents = preg_replace_callback('/"[^"]*"|([:])\s+/ims',
  54.         function ($matches) {
  55.             if (array_key_exists (1, $matches)) {
  56.                 return $matches[1] ;
  57.             }
  58.             return $matches[0];
  59.         },
  60.         $contents
  61.     );
  62.  
  63.     // End the file with a new line.
  64.     $contents = trim($contents);
  65.     $contents .= "\n";
  66.   }
  67.  
  68.   // Replaces @import commands with the actual stylesheet content.
  69.   // This happens recursively but omits external files.
  70.   $contents = preg_replace_callback('/@import\s*(?:url\(\s*)?[\'"]?(?![a-z]+:)([^\'"\()]+)[\'"]?\s*\)?\s*;/', '_drupal_load_stylesheet', $contents);
  71.   return $contents;
  72. }
  73.  
  74.  
  75.  
  76.  
  77.  
  78. ?>
  79.  
Success #stdin #stdout #stderr 0.01s 20568KB
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stdin
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Standard input is empty
stdout
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img[style*="float: left"]
img:[style*="float: left"]
img([style*="float: left"]
stderr
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PHP Warning:  preg_replace_callback(): Requires argument 2, '_drupal_load_stylesheet', to be a valid callback in /home/dm4eCV/prog.php on line 70
https://ideone.com/YJOaQj
language:
PHP (php 7.3.5)
created:
10 years ago
visibility:
public

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