3v4l.org

run code in 300+ PHP versions simultaneously
<?php function replace_unicode_escape_sequence($match) { var_dump($match); return mb_convert_encoding(pack('H*', $match[1]), 'UTF-8', 'UCS-2BE'); } $str = "Bal\u00edky"; $str = preg_replace_callback('/\\\\u([0-9a-f]{4})/i', 'replace_unicode_escape_sequence', $str); echo $str;

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)
8.3.60.0090.00618.27
8.3.50.0120.00521.96
8.3.40.0040.01118.93
8.3.30.0090.01219.23
8.3.20.0000.00820.16
8.3.10.0050.00321.75
8.3.00.0090.00920.95
8.2.180.0070.00716.50
8.2.170.0090.00622.96
8.2.160.0030.01020.39
8.2.150.0070.01124.18
8.2.140.0040.00424.66
8.2.130.0150.00626.16
8.2.120.0030.00620.84
8.2.110.0030.00622.15
8.2.100.0130.00019.82
8.2.90.0040.00419.17
8.2.80.0030.00617.97
8.2.70.0040.00417.75
8.2.60.0030.00618.05
8.2.50.0000.00818.07
8.2.40.0030.00718.34
8.2.30.0100.00018.25
8.2.20.0040.00417.97
8.2.10.0030.00518.09
8.2.00.0040.00417.96
8.1.280.0110.01525.92
8.1.270.0070.01023.96
8.1.260.0080.00026.35
8.1.250.0060.01328.09
8.1.240.0090.00023.75
8.1.230.0070.00319.09
8.1.220.0040.00417.74
8.1.210.0000.01118.77
8.1.200.0040.00717.48
8.1.190.0000.00817.35
8.1.180.0050.00318.10
8.1.170.0000.00818.86
8.1.160.0040.00422.05
8.1.150.0040.00418.72
8.1.140.0000.00817.67
8.1.130.0000.00817.90
8.1.120.0040.00417.64
8.1.110.0050.00317.61
8.1.100.0040.00417.59
8.1.90.0040.00417.66
8.1.80.0000.00817.63
8.1.70.0070.00017.51
8.1.60.0040.00417.69
8.1.50.0040.00417.71
8.1.40.0000.00717.68
8.1.30.0080.00317.82
8.1.20.0030.00617.77
8.1.10.0000.00817.80
8.1.00.0040.00417.72
8.0.300.0050.00218.77
8.0.290.0030.00517.18
8.0.280.0000.00718.47
8.0.270.0000.00717.36
8.0.260.0000.00617.25
8.0.250.0070.00017.07
8.0.240.0090.00017.17
8.0.230.0030.00317.08
8.0.220.0030.00316.95
8.0.210.0000.00717.04
8.0.200.0030.00517.10
8.0.190.0000.00717.17
8.0.180.0040.00417.09
8.0.170.0000.00816.97
8.0.160.0070.00017.09
8.0.150.0000.00716.89
8.0.140.0000.00717.03
8.0.130.0030.00313.48
8.0.120.0040.00416.95
8.0.110.0000.00716.93
8.0.100.0000.00816.95
8.0.90.0000.00717.10
8.0.80.0070.01417.05
8.0.70.0000.00717.05
8.0.60.0000.00816.82
8.0.50.0040.00416.94
8.0.30.0150.00717.36
8.0.20.0110.00817.40
8.0.10.0000.00717.14
8.0.00.0140.00616.72
7.4.330.0020.00215.04
7.4.320.0000.00616.79
7.4.300.0030.00616.87
7.4.290.0050.00516.72
7.4.280.0040.00416.84
7.4.270.0030.00316.72
7.4.260.0000.00716.68
7.4.250.0040.00416.77
7.4.240.0000.00716.73
7.4.230.0040.00416.72
7.4.220.0170.00616.76
7.4.210.0030.01216.68
7.4.200.0000.00716.90
7.4.160.0030.01516.46
7.4.150.0140.00917.40
7.4.140.0110.00717.86
7.4.130.0140.00316.71
7.4.120.0050.01216.74
7.4.110.0070.01516.77
7.4.100.0060.01416.57
7.4.90.0090.00916.62
7.4.80.0120.00819.39
7.4.70.0060.00916.68
7.4.60.0120.00616.74
7.4.50.0000.00516.68
7.4.40.0090.00916.72
7.4.30.0060.01416.74
7.4.00.0100.00515.13
7.3.330.0000.00713.29
7.3.320.0000.00513.31
7.3.310.0070.00016.45
7.3.300.0070.00016.55
7.3.290.0030.01016.53
7.3.280.0070.01016.52
7.3.270.0090.00917.40
7.3.260.0040.01716.76
7.3.250.0110.00916.66
7.3.240.0090.00916.75
7.3.230.0100.00716.51
7.3.210.0070.01316.68
7.3.200.0110.00519.39
7.3.190.0130.01016.59
7.3.180.0070.00716.54
7.3.170.0080.00916.82
7.3.160.0110.00616.77
7.3.120.0060.00615.12
7.3.110.0060.00914.97
7.3.100.0060.00914.63
7.3.90.0060.00614.86
7.3.80.0090.00614.84
7.3.70.0060.00314.98
7.3.60.0040.01114.89
7.3.50.0030.00914.92
7.3.40.0090.00315.01
7.3.30.0070.01014.94
7.3.20.0030.00616.81
7.3.10.0030.01016.84
7.3.00.0070.00716.87
7.2.330.0080.01016.76
7.2.320.0050.01116.71
7.2.310.0060.01216.77
7.2.300.0070.01016.82
7.2.290.0150.01116.79
7.2.250.0000.01915.28
7.2.240.0130.00615.30
7.2.230.0070.00715.07
7.2.220.0000.00915.32
7.2.210.0040.00715.20
7.2.200.0060.00614.95
7.2.190.0070.00315.33
7.2.180.0040.01114.89
7.2.170.0090.00614.87
7.2.130.0110.00416.80
7.2.120.0110.00716.88
7.2.110.0130.00016.87
7.2.100.0080.00417.18
7.2.90.0040.00816.78
7.2.80.0060.00917.07
7.2.70.0000.01117.12
7.2.60.0160.00316.92
7.2.50.0070.01116.75
7.2.40.0100.00317.09
7.2.30.0170.00317.13
7.2.20.0100.00717.15
7.2.10.0090.00317.07
7.2.00.0050.00918.36
7.1.330.0000.01215.90
7.1.320.0030.01416.20
7.1.310.0000.01715.76
7.1.300.0000.01215.98
7.1.290.0000.01216.02
7.1.280.0080.00815.69
7.1.270.0040.00415.96
7.1.260.0100.00016.13
7.1.250.0110.00016.13
7.1.240.0090.00615.86
7.1.230.0040.00816.01
7.1.220.0080.00815.80
7.1.210.0090.00616.11
7.1.200.0030.00615.98
7.1.190.0060.00615.95
7.1.180.0000.00916.03
7.1.170.0130.00315.81
7.1.160.0120.00616.06
7.1.150.0000.01116.03
7.1.140.0040.00416.07
7.1.130.0000.00915.97
7.1.120.0030.01016.06
7.1.110.0060.00615.86
7.1.100.0040.00917.28
7.1.90.0090.00615.84
7.1.80.0030.00616.08
7.1.70.0020.00816.48
7.1.60.0050.01417.84
7.1.50.0040.00716.46
7.1.40.0080.00416.06
7.1.30.0040.00715.84
7.1.20.0050.00515.98
7.1.10.0110.01115.94
7.1.00.0070.03819.23
7.0.330.0060.00615.64
7.0.320.0000.01115.63
7.0.310.0110.00415.80
7.0.300.0090.00915.73
7.0.290.0040.00415.30
7.0.280.0130.00015.61
7.0.270.0000.00915.56
7.0.260.0030.00715.57
7.0.250.0130.00015.79
7.0.240.0000.01215.36
7.0.230.0000.00715.71
7.0.220.0040.01115.63
7.0.210.0030.00715.59
7.0.200.0680.00615.25
7.0.190.0030.01015.53
7.0.180.0080.00415.60
7.0.170.0070.00315.61
7.0.160.0000.01015.62
7.0.150.0070.01115.63
7.0.140.0050.03818.84
7.0.130.0030.00915.78
7.0.120.0090.00315.55
7.0.110.0030.01015.59
7.0.100.0030.00715.59
7.0.90.0110.00315.29
7.0.80.0030.00615.72
7.0.70.0110.00415.44
7.0.60.0010.04617.78
7.0.50.0050.04416.75
7.0.40.0090.02716.99
7.0.30.0300.04016.96
7.0.20.0160.02316.98
7.0.10.0060.04716.81
7.0.00.0110.02716.92
5.6.380.0070.00714.64
5.6.370.0000.00914.71
5.6.360.0080.00414.30
5.6.350.0120.00314.26
5.6.340.0030.00614.44
5.6.330.0060.00614.50
5.6.320.0070.00413.94
5.6.310.0030.00914.23
5.6.300.0090.00314.68
5.6.290.0060.00614.04
5.6.280.0100.03317.79
5.6.270.0110.00014.20
5.6.260.0000.01214.54
5.6.250.0080.00414.64
5.6.240.0000.00914.51
5.6.230.0110.00014.29
5.6.220.0160.00314.16
5.6.210.0060.02417.57
5.6.200.0070.03516.23
5.6.190.0070.02317.49
5.6.180.0800.03517.42
5.6.170.0230.03717.50
5.6.160.0110.03817.50
5.6.150.0080.04016.27
5.6.140.0100.02216.48
5.6.130.0150.02716.21
5.6.120.0110.04017.62
5.6.110.0050.02817.80
5.6.100.0060.04517.72
5.6.90.0060.04017.59
5.6.80.0030.03317.36
5.6.70.2180.02817.44
5.6.60.0150.00614.36
5.6.50.0150.00314.27
5.6.40.0170.00314.08
5.6.30.0120.00614.38
5.6.20.0160.00314.14
5.6.10.0130.00314.27
5.6.00.0090.00614.25
5.5.380.0030.00711.17
5.5.370.0040.00411.37
5.5.360.0100.00711.18
5.5.350.0160.03615.77
5.5.340.0080.04014.65
5.5.330.0080.02715.89
5.5.320.0200.02015.71
5.5.310.0210.03615.73
5.5.300.0060.02614.43
5.5.290.0070.04214.66
5.5.280.0020.05015.93
5.5.270.0050.02615.92
5.5.260.0070.04216.11
5.5.250.0050.03315.92
5.5.240.0160.03715.53
5.5.230.0080.00511.14
5.5.220.0080.00411.29
5.5.210.0100.00311.14
5.5.200.0160.00011.23
5.5.190.0030.00310.96
5.5.180.0060.00011.27
5.5.170.0110.00411.21
5.5.160.0000.00811.34
5.5.150.0040.00811.12
5.5.140.0080.00011.10
5.5.130.0060.00011.20
5.5.120.0040.00411.30
5.5.110.0040.00411.40
5.5.100.0030.01010.92
5.5.90.0060.00311.24
5.5.80.0000.00810.93
5.5.70.0060.00311.14
5.5.60.0080.00311.09
5.5.50.0030.00711.23
5.5.40.0040.00810.99
5.5.30.0090.00311.00
5.5.20.0030.00611.13
5.5.10.0070.00011.11
5.5.00.0040.00411.07
5.4.450.0150.02719.67
5.4.440.0230.02319.80
5.4.430.0130.02319.63
5.4.420.0300.02019.78
5.4.410.0130.02619.54
5.4.400.0200.02019.17
5.4.390.0290.01719.19
5.4.380.0160.02814.80
5.4.370.0110.03314.68
5.4.360.0050.03614.81
5.4.350.0080.02815.00
5.4.340.0100.02814.97
5.4.330.0040.00411.21
5.4.320.0060.02211.83
5.4.310.0060.02411.80
5.4.300.0070.02311.90
5.4.290.0060.01911.87
5.4.280.0100.01811.83
5.4.270.0040.02011.77
5.4.260.0060.02211.77
5.4.250.0030.02511.82
5.4.240.0040.02111.67
5.4.230.0100.01711.87
5.4.220.0060.02011.84
5.4.210.0060.01911.73
5.4.200.0020.02411.86
5.4.190.0070.02111.69
5.4.180.0030.02111.70
5.4.170.0050.01911.86
5.4.160.0040.02211.76
5.4.150.0080.02011.68
5.4.140.0040.02411.77
5.4.130.0080.02011.60
5.4.120.0100.01811.49
5.4.110.0050.02211.55
5.4.100.0080.01911.64
5.4.90.0080.01911.57
5.4.80.0080.02011.51
5.4.70.0070.01911.55
5.4.60.0060.01811.63
5.4.50.0040.02211.60
5.4.40.0060.02211.60
5.4.30.0100.01811.59
5.4.20.0060.02011.53
5.4.10.0080.01911.52
5.4.00.0060.02011.32
5.3.290.0060.02211.83
5.3.280.0070.02011.65
5.3.270.0070.02111.73
5.3.260.0050.02511.72
5.3.250.0050.02211.70
5.3.240.0070.01911.56
5.3.230.0070.02011.69
5.3.220.0080.02111.66
5.3.210.0070.02911.53
5.3.200.0060.02611.56
5.3.190.0070.02011.56
5.3.180.0110.02211.61
5.3.170.0090.02411.67
5.3.160.0110.02611.69
5.3.150.0060.02911.69
5.3.140.0080.02911.70
5.3.130.0070.02911.54
5.3.120.0090.02811.49
5.3.110.0070.02911.54
5.3.100.0080.02811.31
5.3.90.0070.02711.28
5.3.80.0060.02111.27
5.3.70.0040.02311.30
5.3.60.0080.02311.24
5.3.50.0100.01911.30
5.3.40.0050.02111.29
5.3.30.0060.02211.25
5.3.20.0090.02211.12
5.3.10.0080.01810.95
5.3.00.0090.02111.09
5.2.170.0050.0209.51
5.2.160.0060.0169.52
5.2.150.0060.0219.36
5.2.140.0060.0169.49
5.2.130.0080.0189.49
5.2.120.0100.0139.51
5.2.110.0060.0169.48
5.2.100.0060.0179.47
5.2.90.0050.0189.48
5.2.80.0050.0189.44
5.2.70.0060.0199.43
5.2.60.0060.0199.26
5.2.50.0020.0229.31
5.2.40.0040.0169.36
5.2.30.0040.0179.31
5.2.20.0070.0179.27
5.2.10.0030.0219.21
5.2.00.0050.0159.11
5.1.60.0060.0128.28
5.1.50.0030.0148.44
5.1.40.0050.0148.32
5.1.30.0040.0158.66
5.1.20.0060.0148.70
5.1.10.0030.0178.52
5.1.00.0050.0218.47
5.0.50.0050.0147.19
5.0.40.0050.0136.96
5.0.30.0020.0216.92
5.0.20.0050.0096.97
5.0.10.0040.0126.84
5.0.00.0040.0156.85
4.4.90.0050.0106.10
4.4.80.0040.0106.09
4.4.70.0010.0116.09
4.4.60.0020.0106.09
4.4.50.0030.0106.09
4.4.40.0040.0146.06
4.4.30.0030.0106.09
4.4.20.0020.0106.13
4.4.10.0030.0096.13
4.4.00.0030.0136.09
4.3.110.0020.0116.04
4.3.100.0020.0106.04
4.3.90.0020.0136.02
4.3.80.0020.0176.00
4.3.70.0030.0116.03
4.3.60.0010.0106.02
4.3.50.0060.0066.02
4.3.40.0050.0115.98
4.3.30.0010.0115.36
4.3.20.0010.0105.35
4.3.10.0040.0085.33
4.3.00.0100.00817.15

preferences:
48.62 ms | 401 KiB | 5 Q