3v4l.org

run code in 300+ PHP versions simultaneously
<?php $isset = true; $array = array(); $notSetArray = array(0=>''); $string = ''; // Test Source function TestEmpty() { $array = array(); unset($array); $i = 0; /* The Test */ $t = microtime(true); while($i < 2000) { empty($arrday); ++$i; } echo (microtime(true) - $t); } function TestEmpty2() { $array = array(); unset($array); $i = 0; /* The Test */ $t = microtime(true); while($i < 2000) { ($array == []); ++$i; } echo (microtime(true) - $t); } function TestEmpty3() { $array = array(); unset($array); $i = 0; /* The Test */ $t = microtime(true); while($i < 2000) { ($array === []); ++$i; } echo (microtime(true) - $t); } TestEmpty(); echo '<hr>-----'; TestEmpty2(); echo '<hr>-----'; TestEmpty3();

preferences:
34.56 ms | 402 KiB | 5 Q