Online PHP editor | output for fL9aH

@ 2018-02-15T14:36:10Z

<?php
$css=<<<CSS
    p.special {
                 font: 12pt/14pt sans-serif;
                 margin: 5px 0px 2px 25px;
                 border: medium dashed #ff0000;
                 background: white url( http://www.foo.com/image.gif ) repeat-x fixed top right; }
                 
                 /************************************************* 
Save with a name ending in .css such as styles.css *************************************************/

h1 {
	color: red; padding: 10px; text-decoration: underline;
}

.code_sample ul {
        list-style-type: upper-roman;  /* LEAVE THIS BIT OUT */
        margin-left: 50px;
}
.code_sample p {
    color: darkblue
}

a:link, a:visited, a:hover, a:active {
  background-color: green;
  color: white;
  padding: 10px 25px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
}
CSS;

$patterns=[
    '~\s+~',  // reduce one or more consecutive whitespace characters ([\n\r \t]+) to a single space  ...this combines the 2nd, 3rd, and 4th pattern from catchamonkey's answer
    '~/\s*\*.*?\*/\s*|(?:(?<=[,:;{}(]) | (?=[,:;{})]))|;(?=})|^ | $~s'  // comment blocks, leading/trailing spaces after ,:;{} characters, space before ), space after (, semicolon followed by }, whitespace at start/end of file
    ];
    
$replacements=[
    ' ',
    ''
];

//  And here's a rabbit hole: https://regex101.com/r/nZbHND/1

var_export(preg_replace($patterns,$replacements,$css));

Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6: 'p.special{font:12pt/14pt sans-serif;margin:5px 0px 2px 25px;border:medium dashed #ff0000;background:white url(http://www.foo.com/image.gif) repeat-x fixed top right;}h1{color:red;padding:10px;text-decoration:underline;}.code_sample ul{list-style-type:upper-roman;margin-left:50px;}.code_sample p{color:darkblue}a:link,a:visited,a:hover,a:active{background-color:green;color:white;padding:10px 25px;text-align:center;text-decoration:none;display:inline-block;}'
Output for 8.3.5: Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 'p.special{font:12pt/14pt sans-serif;margin:5px 0px 2px 25px;border:medium dashed #ff0000;background:white url(http://www.foo.com/image.gif) repeat-x fixed top right;}h1{color:red;padding:10px;text-decoration:underline;}.code_sample ul{list-style-type:upper-roman;margin-left:50px;}.code_sample p{color:darkblue}a:link,a:visited,a:hover,a:active{background-color:green;color:white;padding:10px 25px;text-align:center;text-decoration:none;display:inline-block;}'

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