3v4l.org

run code in 300+ PHP versions simultaneously
<?php function IsCasiPalindromo($str){ $count = 0; $idx1 = 0; $idx2 = strlen($str)-1; while($idx1 <= $idx2){ echo $idx1; echo $idx2; if($str[$idx1] != $str[$idx2]){ $count++; } $idx1++; $idx2--; } return ($count<=1); } echo IsCasiPalindromo("abccba"); echo IsCasiPalindromo("abccbx"); echo IsCasiPalindromo("abccfg");

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)
8.3.60.0120.00316.75
8.3.50.0180.00721.92
8.3.40.0140.00718.59
8.3.30.0120.00918.70
8.3.20.0040.00420.39
8.3.10.0080.00023.68
8.3.00.0080.00019.25
8.2.180.0150.00316.63
8.2.170.0120.00322.96
8.2.160.0100.00320.16
8.2.150.0050.00324.18
8.2.140.0080.00024.66
8.2.130.0080.00017.63
8.2.120.0040.00426.35
8.2.110.0080.00020.35
8.2.100.0110.00018.22
8.2.90.0000.00819.21
8.2.80.0100.00317.97
8.2.70.0040.00417.60
8.2.60.0050.00317.93
8.2.50.0040.00418.07
8.2.40.0070.00019.34
8.2.30.0050.00220.69
8.2.20.0050.00317.77
8.2.10.0040.00418.02
8.2.00.0070.00018.13
8.1.280.0090.00925.92
8.1.270.0060.00323.92
8.1.260.0000.00828.09
8.1.250.0060.01228.09
8.1.240.0040.00422.02
8.1.230.0090.00319.16
8.1.220.0030.00517.74
8.1.210.0080.00018.77
8.1.200.0030.00617.23
8.1.190.0000.00817.35
8.1.180.0040.00418.10
8.1.170.0050.00518.63
8.1.160.0000.00722.02
8.1.150.0040.00418.97
8.1.140.0000.00819.67
8.1.130.0030.00317.68
8.1.120.0040.00417.45
8.1.110.0000.00717.36
8.1.100.0050.00217.44
8.1.90.0040.00417.38
8.1.80.0070.00017.37
8.1.70.0070.00017.34
8.1.60.0060.00317.48
8.1.50.0000.00917.53
8.1.40.0000.00817.44
8.1.30.0040.00417.71
8.1.20.0040.00417.66
8.1.10.0040.00417.49
8.1.00.0040.00417.46
8.0.300.0040.00418.77
8.0.290.0040.00416.63
8.0.280.0030.00318.37
8.0.270.0070.00017.27
8.0.260.0000.00817.32
8.0.250.0080.00017.03
8.0.240.0000.00816.97
8.0.230.0080.00016.97
8.0.220.0080.00316.93
8.0.210.0080.00016.91
8.0.200.0030.00316.90
8.0.190.0000.00816.96
8.0.180.0030.00416.89
8.0.170.0080.00016.86
8.0.160.0070.00016.95
8.0.150.0070.00016.74
8.0.140.0000.00716.85
8.0.130.0050.00213.31
8.0.120.0050.00316.92
8.0.110.0000.00716.74
8.0.100.0040.00416.89
8.0.90.0000.00716.77
8.0.80.0070.01116.79
8.0.70.0040.00416.76
8.0.60.0000.00716.90
8.0.50.0040.00416.85
8.0.30.0100.00816.94
8.0.20.0080.01117.41
8.0.10.0040.00416.85
8.0.00.0080.01116.82
7.4.330.0050.00016.67
7.4.320.0000.00616.44
7.4.300.0000.00616.51
7.4.290.0000.00716.58
7.4.280.0040.00416.63
7.4.270.0000.00716.59
7.4.260.0030.00316.63
7.4.250.0040.00416.47
7.4.240.0060.00216.63
7.4.230.0000.00716.60
7.4.220.0140.00416.44
7.4.210.0060.01016.59
7.4.200.0030.00316.58
7.4.160.0100.00716.57
7.4.150.0090.00817.40
7.4.140.0080.01017.86
7.4.130.0050.01316.45
7.4.120.0080.01416.58
7.4.110.0140.00516.59
7.4.100.0120.00916.53
7.4.90.0090.00916.48
7.4.80.0080.01319.39
7.4.70.0110.00716.68
7.4.60.0120.00716.48
7.4.50.0030.00916.68
7.4.40.0070.01016.37
7.4.30.0060.01216.59
7.4.00.0080.00414.68
7.3.330.0000.00513.34
7.3.320.0030.00313.19
7.3.310.0040.00416.37
7.3.300.0030.00316.38
7.3.290.0000.00616.33
7.3.280.0080.00916.37
7.3.270.0090.00917.40
7.3.260.0120.00616.45
7.3.250.0130.00616.43
7.3.240.0030.01716.38
7.3.230.0090.00916.39
7.3.210.0090.00916.72
7.3.200.0100.01016.34
7.3.190.0070.01716.66
7.3.180.0060.00916.36
7.3.170.0160.00716.45
7.3.160.0100.00616.34
7.2.330.0030.01316.70
7.2.320.0150.00316.76
7.2.310.0060.01516.50
7.2.300.0050.01416.70
7.2.290.0120.00616.66
7.2.00.0060.00919.59
7.1.100.0520.00715.82
7.1.70.0030.00716.79
7.1.60.0140.01019.12
7.1.50.0030.01716.68
7.1.00.0000.08022.43
7.0.200.0000.00716.89
7.0.100.0300.08019.96
7.0.90.0100.08019.90
7.0.80.0130.08019.88
7.0.70.0100.05019.82
7.0.60.0000.05019.80
7.0.50.0070.08320.36
7.0.40.0070.06319.95
7.0.30.0130.07320.08
7.0.20.0070.04720.18
7.0.10.0030.08320.00
7.0.00.0070.08320.14
5.6.280.0030.04720.89
5.6.250.0100.08020.64
5.6.240.0100.08020.60
5.6.230.0070.06720.57
5.6.220.0170.03720.55
5.6.210.0100.05720.40
5.6.200.0070.08321.00
5.6.190.0070.08021.13
5.6.180.0100.08320.96
5.6.170.0130.08721.14
5.6.160.0070.08021.06
5.6.150.0170.06721.11
5.6.140.0100.08021.05
5.6.130.0100.08721.02
5.6.120.0030.05321.06
5.6.110.0030.04721.00
5.6.100.0070.05020.96
5.6.90.0070.05321.02
5.6.80.0100.08020.33
5.6.70.0070.06320.43
5.6.60.0100.08020.37
5.6.50.0070.04720.42
5.6.40.0070.08020.46
5.6.30.0130.04020.41
5.6.20.0030.05020.38
5.6.10.0030.09020.38
5.6.00.0070.06320.38
5.5.380.0070.08320.41
5.5.370.0100.05020.52
5.5.360.0070.07320.32
5.5.350.0130.07720.28
5.5.340.0070.04720.73
5.5.330.0130.07720.77
5.5.320.0030.08020.89
5.5.310.0170.06320.91
5.5.300.0030.08320.82
5.5.290.0070.08020.92
5.5.280.0070.08320.83
5.5.270.0100.08020.79
5.5.260.0130.06320.86
5.5.250.0030.08720.68
5.5.240.0100.04720.18
5.5.230.0130.07320.30
5.5.220.0170.07020.25
5.5.210.0030.07320.31
5.5.200.0100.07319.96
5.5.190.0200.06720.23
5.5.180.0130.08020.13
5.5.160.0030.08720.22
5.5.150.0000.08020.12
5.5.140.0070.07020.23
5.5.130.0030.05020.23
5.5.120.0130.07320.17
5.5.110.0070.06320.07
5.5.100.0070.07320.10
5.5.90.0030.07720.14
5.5.80.0170.07320.06
5.5.70.0100.07720.01
5.5.60.0070.05320.09
5.5.50.0000.08320.03
5.5.40.0070.07720.05
5.5.30.0130.07320.11
5.5.20.0100.08020.07
5.5.10.0070.07720.04
5.5.00.0100.07720.03

preferences:
50.64 ms | 401 KiB | 5 Q