3v4l.org

run code in 300+ PHP versions simultaneously
<?php <pre><?php $refs = array(); function wrap( $arr){ // Need to clear out the global references array, I chose to do this here global $refs; $refs = array(); test( $arr); } function test( $arr){ global $refs; foreach( $arr as $v) { if( $v === $arr || in_array( $v, $refs)) { print ' ref '; $refs[] = $v; } else { if( is_array( $v)) { test( $v); } else { print $v . ', '; } } } } echo "Array 1:\n"; $array1 = array(1, 2, 3); $array1[4] = &$array1; wrap( $array1); echo "\nArray 2:\n"; $array2 = array(1, 2, 3, array(1, 2, 3)); $array2[2] = &$array2; wrap( $array2); echo "\nArray 3:\n"; $array3 = array(1, 2, 3, array(1, 2, 3)); $array3[3][1] = &$array3; wrap( $array3);

Here you find the average performance (time & memory) of each version. A grayed out version indicates it didn't complete successfully (based on exit-code).

VersionSystem time (s)User time (s)Memory (MiB)
5.4.140.0130.04512.04
5.4.130.0240.06412.03
5.4.120.0130.04311.99
5.4.110.0130.04311.98
5.4.100.0160.04511.99
5.4.90.0140.04411.98
5.4.80.0160.06011.98
5.4.70.0190.03811.98
5.4.60.0150.04111.98
5.4.50.0140.04311.98
5.4.40.0230.06411.97
5.4.30.0140.04311.97
5.4.20.0140.04211.96
5.4.10.0230.06311.96
5.4.00.0190.05211.46
5.3.240.0140.04712.72
5.3.230.0120.05012.71
5.3.220.0200.05512.68
5.3.210.0140.04512.68
5.3.200.0170.04312.68
5.3.190.0270.06512.68
5.3.180.0160.04312.67
5.3.170.0210.06712.67
5.3.160.0190.04112.67
5.3.150.0160.04312.67
5.3.140.0210.06712.66
5.3.130.0170.04212.66
5.3.120.0130.04612.66
5.3.110.0170.04312.65
5.3.100.0190.05612.12
5.3.90.0150.04312.08
5.3.80.0160.04312.07
5.3.70.0150.04612.08
5.3.60.0250.08012.07
5.3.50.0170.04212.00
5.3.40.0170.04112.00
5.3.30.0190.05311.94
5.3.20.0110.04711.71
5.3.10.0160.03911.67
5.3.00.0140.04211.66

preferences:
133.64 ms | 1399 KiB | 7 Q