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<?php
namespace Drupal\Component\Utility;
/**
* Provides PHP environment helper methods.
*/
class Environment {
/**
* Compares the memory required for an operation to the available memory.
*
* @param string $required
* The memory required for the operation, expressed as a number of bytes with
* optional SI or IEC binary unit prefix (e.g. 2, 3K, 5MB, 10G, 6GiB, 8bytes,
* 9mbytes).
* @param $memory_limit
* (optional) The memory limit for the operation, expressed as a number of
* bytes with optional SI or IEC binary unit prefix (e.g. 2, 3K, 5MB, 10G,
* 6GiB, 8bytes, 9mbytes). If no value is passed, the current PHP
* memory_limit will be used. Defaults to NULL.
*
* @return bool
* TRUE if there is sufficient memory to allow the operation, or FALSE
* otherwise.
*/
public static function checkMemoryLimit($required, $memory_limit = NULL) {
if (!isset($memory_limit)) {
$memory_limit = ini_get('memory_limit');
}
// There is sufficient memory if:
// - No memory limit is set.
// - The memory limit is set to unlimited (-1).
// - The memory limit is greater than or equal to the memory required for
// the operation.
return ((!$memory_limit) || ($memory_limit == -1) || (Bytes::toInt($memory_limit) >= Bytes::toInt($required)));
}
}