Question

I am working to clean up CSS output with str_replace, but need to ignore certain block of strings with a defined start and end.

Ignore anything that starts with:

@media blah(this can be any value) {

content to ignore:

  .class {
    property: value;
  }

and ends with:

}/*ends*/

And do str_replace outside that block instead:

.otherclass {property:value;}

PHP:

$output = str_replace("{", "{\n", $output);
$output = str_replace("}", "}\n", $output);

The reason is that @media block need proper indentation which is already correctly formatted, and should not be touched by str_replace which simple return readable lines:

 .otherclass {
  property:value;
  }

How would you say it in PHP?

Thanks

Answer 1

$string = 
"@media blah(this can be any value) {
.class {
    property: value;
  }
}/*ends*/

.otherclass {property:value;}

.otherclass {property:value;}

@media blah(this can be any value) {
.class {
    property: value;
  }
}/*ends*/

.otherclass {property:value;}

.otherclass {property:value;}";

$arr = explode("\r", $string);

$ignore_block = false;
for ($i = 0; $i < count($arr); $i++)
{
    if (strstr($arr[$i], '@media'))
        $ignore_block = true;
    elseif (strstr($arr[$i-1], '/*ends*/'))
        $ignore_block = false;

    if ($ignore_block == false)
    {
        $arr[$i] = str_replace("{", "{\n\t", $arr[$i]);
        $arr[$i] = str_replace("}", "\n}\n", $arr[$i]);
    }
}
file_put_contents("test.txt", implode("\n", $arr));

Regex won’t work since lookbehind doesn’t allow variable length. Try and loop through the file.