3v4l.org

run code in 300+ PHP versions simultaneously
<?php function seems_utf8($str) { $length = strlen($str); for ($i = 0; $i < $length; $i++) { $c = ord($str[$i]); if ($c < 0x80) $n = 0; elseif (($c & 0xE0) == 0xC0) $n = 1; elseif (($c & 0xF0) == 0xE0) $n = 2; elseif (($c & 0xF8) == 0xF0) $n = 3; elseif (($c & 0xFC) == 0xF8) $n = 4; elseif (($c & 0xFE) == 0xFC) $n = 5; else return false; for ($j=0; $j<$n; $j++) { if ((++$i == $length) || ((ord($str[$i]) & 0xC0) != 0x80)) return false; } } return true; } var_dump( seems_utf8("aťsd") );

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)
8.3.60.0060.00918.56
8.3.50.0070.00717.98
8.3.40.0110.00418.75
8.3.30.0110.00418.59
8.3.20.0000.00719.15
8.3.10.0060.00321.78
8.3.00.0000.00823.48
8.2.180.0070.00718.43
8.2.170.0070.00722.96
8.2.160.0040.01119.47
8.2.150.0030.00524.18
8.2.140.0050.00324.66
8.2.130.0040.00419.36
8.2.120.0070.00026.35
8.2.110.0090.00021.97
8.2.100.0040.00717.91
8.2.90.0040.00419.28
8.2.80.0040.00417.97
8.2.70.0000.00817.93
8.2.60.0060.00318.16
8.2.50.0000.00818.10
8.2.40.0050.00319.30
8.2.30.0080.00319.41
8.2.20.0000.00818.18
8.2.10.0040.00418.11
8.2.00.0040.00419.42
8.1.280.0060.01225.92
8.1.270.0050.00322.11
8.1.260.0040.00426.35
8.1.250.0030.00628.09
8.1.240.0040.00420.50
8.1.230.0040.00817.57
8.1.220.0040.00417.74
8.1.210.0080.00018.77
8.1.200.0060.00317.35
8.1.190.0030.00617.23
8.1.180.0000.00818.10
8.1.170.0060.00318.89
8.1.160.0070.00018.88
8.1.150.0050.00318.82
8.1.140.0030.00517.69
8.1.130.0030.00319.01
8.1.120.0030.00317.43
8.1.110.0090.00017.36
8.1.100.0000.00717.42
8.1.90.0090.00017.41
8.1.80.0040.00417.47
8.1.70.0070.00017.34
8.1.60.0000.00817.60
8.1.50.0040.00817.40
8.1.40.0030.00517.56
8.1.30.0000.00717.50
8.1.20.0040.00417.65
8.1.10.0040.00417.45
8.1.00.0000.00817.49
8.0.300.0080.00318.77
8.0.290.0060.00316.75
8.0.280.0000.00718.44
8.0.270.0030.00317.29
8.0.260.0070.00017.11
8.0.250.0030.00616.94
8.0.240.0000.00716.91
8.0.230.0030.00316.92
8.0.220.0040.00416.87
8.0.210.0000.00716.87
8.0.200.0030.00316.97
8.0.190.0000.00816.97
8.0.180.0050.00316.92
8.0.170.0050.00316.93
8.0.160.0050.00316.97
8.0.150.0000.00916.74
8.0.140.0030.00516.89
8.0.130.0030.00313.25
8.0.120.0030.00516.87
8.0.110.0000.00716.88
8.0.100.0000.00716.66
8.0.90.0000.00716.84
8.0.80.0080.00816.88
8.0.70.0040.00416.77
8.0.60.0040.00416.83
8.0.50.0040.00416.75
8.0.30.0100.00917.01
8.0.20.0130.00517.40
8.0.10.0050.00317.04
8.0.00.0050.01216.79
7.4.330.0040.00015.55
7.4.320.0030.00316.58
7.4.300.0060.00016.45
7.4.290.0040.00416.55
7.4.280.0000.00716.41
7.4.270.0000.00716.61
7.4.260.0000.00716.50
7.4.250.0070.00016.54
7.4.240.0000.00716.65
7.4.230.0050.00216.63
7.4.220.0040.00416.69
7.4.210.0090.00616.56
7.4.200.0000.00716.70
7.4.160.0090.00816.54
7.4.140.0090.01017.86
7.4.130.0070.01016.54
7.4.120.0110.01016.48
7.4.110.0100.00716.41
7.4.100.0090.00916.48
7.4.90.0130.00316.43
7.4.80.0090.01019.39
7.4.70.0030.01216.59
7.4.60.0080.00816.33
7.4.50.0000.01516.43
7.4.40.0070.01016.29
7.4.10.0100.01015.11
7.4.00.0040.01215.02
7.3.330.0030.00313.20
7.3.320.0070.00013.35
7.3.310.0070.00016.33
7.3.300.0000.00716.41
7.3.290.0030.00316.41
7.3.280.0070.01116.35
7.3.260.0110.00716.55
7.3.240.0130.00916.48
7.3.230.0030.01416.37
7.3.210.0100.01316.60
7.3.200.0070.01016.59
7.3.190.0090.00616.30
7.3.180.0180.00316.29
7.3.170.0120.00316.34
7.3.160.0070.01016.32
7.3.130.0040.01414.87
7.3.120.0100.00714.94
7.3.110.0080.00814.86
7.3.100.0060.01014.77
7.3.90.0030.00914.72
7.3.80.0060.01014.81
7.3.70.0040.00814.80
7.3.60.0090.00714.93
7.3.50.0050.01014.80
7.3.40.0070.00814.91
7.3.30.0060.00714.83
7.3.20.0050.01016.68
7.3.10.0060.00816.63
7.3.00.0090.00716.71
7.2.330.0100.01016.82
7.2.320.0030.01516.59
7.2.310.0130.01016.68
7.2.300.0100.00716.71
7.2.290.0090.01316.85
7.2.260.0070.01015.01
7.2.250.0070.00915.03
7.2.240.0040.01215.12
7.2.230.0040.01115.09
7.2.220.0070.00615.07
7.2.210.0040.00914.99
7.2.200.0060.00915.19
7.2.190.0050.00915.00
7.2.180.0080.00715.03
7.2.170.0060.01014.99
7.2.160.0040.00615.07
7.2.150.0080.00816.99
7.2.140.0060.00816.97
7.2.130.0090.00716.94
7.2.120.0090.00716.89
7.2.110.0050.01116.93
7.2.100.0090.00617.02
7.2.90.0070.00516.94
7.2.80.0030.01016.70
7.2.70.0100.01016.29
7.2.60.0230.00916.36
7.2.50.0160.00616.30
7.2.40.0150.00816.37
7.2.30.0230.00616.30
7.2.20.0160.01016.37
7.2.10.0430.00916.31
7.2.00.0120.00816.14
7.1.330.0050.00715.83
7.1.320.0060.00715.89
7.1.310.0080.00615.82
7.1.300.0070.00715.83
7.1.290.0060.00715.78
7.1.280.0050.00715.79
7.1.270.0070.00515.65
7.1.260.0030.01215.80
7.1.250.0060.00715.66
7.1.240.0060.00615.99
7.1.230.0040.01115.84
7.1.220.0060.00915.85
7.1.210.0030.00715.73
7.1.200.0080.00815.86
7.1.190.0030.00615.83
7.1.180.0070.00315.91
7.1.170.0160.01114.96
7.1.160.0260.00914.85
7.1.150.0160.01014.77
7.1.140.0240.00914.91
7.1.130.0180.00514.98
7.1.120.0200.00514.88
7.1.110.0190.00514.84
7.1.100.0160.00714.98
7.1.90.0270.00714.91
7.1.80.0190.00914.85
7.1.70.0160.00514.80
7.1.60.0290.00523.99
7.1.50.0230.00823.87
7.1.40.0280.00523.96
7.1.30.0250.01023.79
7.1.20.0260.01323.84
7.1.10.0160.00914.85
7.1.00.0160.00814.88
7.0.330.0060.00315.51
7.0.320.0060.00615.51
7.0.310.0080.00415.63
7.0.300.0070.01115.53
7.0.290.0120.00015.57
7.0.280.0060.00615.60
7.0.270.0050.00815.66
7.0.260.0030.00915.20
7.0.250.0040.00815.39
7.0.240.0040.00815.60
7.0.230.0030.00715.51
7.0.220.0030.00615.44
7.0.210.0030.00915.63
7.0.200.0060.00915.19
7.0.190.0040.00815.41
7.0.180.0050.00815.50
7.0.170.0030.01015.51
7.0.160.0090.00915.58
7.0.150.0060.01015.36
7.0.140.0130.00015.64
7.0.130.0000.01515.45
7.0.120.0070.00715.20
7.0.110.0070.00815.45
7.0.100.0060.00615.46
7.0.90.0000.01415.57
7.0.80.0070.00415.49
7.0.70.0100.00315.34
7.0.60.0080.00015.41
7.0.50.0030.01015.61
7.0.40.0030.01013.56
7.0.30.0030.01013.50
7.0.20.0100.00613.25
7.0.10.0050.00513.35
7.0.00.0040.01113.59
5.6.400.0030.00614.39
5.6.390.0120.00014.23
5.6.380.0000.01014.43
5.6.370.0030.01014.16
5.6.360.0090.00614.52
5.6.350.0000.00914.61
5.6.340.0070.00714.21
5.6.330.0090.00014.72
5.6.320.0030.00914.50
5.6.310.0110.00614.40
5.6.300.0070.00714.63
5.6.290.0060.00614.64
5.6.280.0030.00714.39
5.6.270.0030.00714.46
5.6.260.0090.00614.52
5.6.250.0030.01214.34
5.6.240.0060.00314.63
5.6.230.0030.01014.28
5.6.220.0090.00014.20
5.6.210.0040.00414.28
5.6.200.0060.00614.45
5.6.190.0040.01114.58
5.6.180.0060.00314.15
5.6.170.0030.00614.66
5.6.160.0030.01014.33
5.6.150.0150.00014.48
5.6.140.0050.00314.32
5.6.130.0070.00714.25
5.6.120.0030.00514.50
5.6.110.0000.01114.33
5.6.100.0060.00914.23
5.6.90.0070.00714.32
5.6.80.0060.00814.41
5.6.70.0110.00414.40
5.6.60.0060.00914.27
5.6.50.0110.00314.42
5.6.40.0040.00414.43
5.6.30.0030.00714.23
5.6.20.0030.00614.19
5.6.10.0110.00314.44
5.6.00.0030.01014.34

preferences:
49.13 ms | 401 KiB | 5 Q