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CSSmin: make changing PHP settings optional

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This commit is contained in:
Steve Clay 2012-03-16 14:41:27 -04:00
parent 9fa1463ab7
commit 9ccc1e98a7
1 changed files with 54 additions and 1 deletions
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55
min/lib/CSSMin.php
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@ -28,6 +28,16 @@ class CSSmin
private $preserved_tokens = array();
/**
* @param bool $raisePhpSettingsLimits if true, raisePhpSettingLimits() will
* be called.
*/
public function __construct($raisePhpSettingsLimits = true)
{
if ($raisePhpSettingsLimits) {
$this->raisePhpSettingLimits();
}
}
/**
* Minify a string of CSS
@ -122,8 +132,35 @@ class CSSmin
return implode('', $css_chunks);
}
/**
* Get the minimum PHP setting values suggested for CSSmin
* @return array
*/
public function getSuggestedPhpLimits()
{
return array(
'memory_limit' => '128M',
'pcre.backtrack_limit' => 1000 * 1000,
'pcre.recursion_limit' => 500 * 1000,
);
}
/**
* Configure PHP to use at least the suggested minimum settings
*
* @todo Move this functionality to separate class.
*/
public function raisePhpSettingLimits()
{
foreach ($this->getSuggestedPhpLimits() as $key => $val) {
$current = $this->normalizeInt(ini_get($key));
$suggested = $this->normalizeInt($val);
if ($current < $suggested) {
ini_set($key, $val);
}
}
}
/**
* Does bulk of the minification
@ -564,5 +601,21 @@ class CSSmin
return ($slice === FALSE) ? '' : $slice;
}
/**
* Convert strings like "64M" to int values
* @param mixed $size
* @return int
*/
private function normalizeInt($size)
{
if (is_string($size)) {
switch (substr($size, -1)) {
case 'M': case 'm': return (int)$size * 1048576;
case 'K': case 'k': return (int)$size * 1024;
case 'G': case 'g': return (int)$size * 1073741824;
default: return (int) $size;
}
}
return (int) $size;
}
}