3v4l.org

run code in 300+ PHP versions simultaneously
<?php function is_palindrome(string $str): bool { return $str === implode('', array_reverse(grapheme_str_split($str))); } $palindrome = 'satanoscillatemymetallicsonatas'; $polar_bear = "\u{1f43b}\u{200d}\u{2744}\u{fe0f}"; $palindrome = str_replace('y', $polar_bear, $palindrome); echo "$palindrome is" . (is_palindrome($palindrome) ? "" : " not") . " a palindrome";

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)
8.5.30.0090.00817.98
8.5.20.0060.01119.86
8.5.10.0100.01116.98
8.5.00.0140.00921.40
8.4.180.0120.01020.99
8.4.170.0130.00827.34
8.4.160.0150.00723.31
8.4.150.0100.00618.71
8.4.140.0230.00818.64
8.4.130.0330.01018.52
8.4.120.0370.01018.77
8.4.110.0370.01119.33
8.4.100.0350.01118.67
8.4.90.0370.01018.71
8.4.80.0410.01018.70
8.4.70.0400.01018.75
8.4.60.0380.00818.80
8.4.50.0370.01218.71
8.4.40.0430.00918.56
8.4.30.0430.00718.55
8.4.20.0360.01018.45
8.4.10.0400.01118.51
8.3.300.0090.01220.70
8.3.290.0110.00820.82
8.3.280.0310.01018.13
8.3.270.0350.01016.58
8.3.260.0400.00917.21
8.3.250.0380.00716.45
8.3.240.0370.00816.37
8.3.230.0370.01216.40
8.3.220.0400.01116.54
8.3.210.0360.00916.48
8.3.200.0340.00916.61
8.3.190.0360.01016.59
8.3.180.0370.00916.54
8.3.170.0420.00816.43
8.3.160.0430.00916.58
8.3.150.0360.01117.09
8.3.140.0400.01017.21
8.3.130.0310.01116.48
8.3.120.0300.01016.58
8.3.110.0370.00816.65
8.3.100.0370.01116.57
8.3.90.0410.00916.52
8.3.80.0400.00717.13
8.3.70.0360.00917.13
8.3.60.0410.00916.65
8.3.50.0400.00816.66
8.3.40.0340.00918.23
8.3.30.0230.00917.68
8.3.20.0300.00917.71
8.3.10.0280.00817.75
8.3.00.0230.00817.82
8.2.300.0050.00420.16
8.2.290.0280.00916.62
8.2.280.0260.00816.52
8.2.270.0330.00716.75
8.2.260.0310.00716.53
8.2.250.0270.01016.65
8.2.240.0290.00816.43
8.2.230.0240.00916.50
8.2.220.0270.00616.63
8.2.210.0250.00716.29
8.2.200.0270.00916.51
8.2.190.0270.00816.55
8.2.180.0270.00916.50
8.2.170.0280.00818.00
8.2.160.0280.00917.85
8.2.150.0280.00817.87
8.2.140.0280.01117.68
8.2.130.0290.00817.68
8.2.120.0320.00917.71
8.2.110.0340.00917.75
8.2.100.0330.00917.64
8.2.90.0310.00917.68
8.2.80.0320.00917.63
8.2.70.0300.01117.63
8.2.60.0310.01017.71
8.2.50.0350.00917.57
8.2.40.0310.01017.65
8.2.30.0320.00817.62
8.2.20.0290.00917.68
8.2.10.0300.01117.65
8.2.00.0260.00817.76
8.1.340.0120.00821.68

preferences:
33.03 ms | 403 KiB | 5 Q