3v4l.org

run code in 300+ PHP versions simultaneously
<?php function replace_unicode_escape_sequence($match) { echo $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)
8.3.60.0110.00316.50
8.3.50.0110.00921.96
8.3.40.0110.00419.14
8.3.30.0100.00319.13
8.3.20.0030.00720.30
8.3.10.0080.00823.38
8.3.00.0080.00020.83
8.2.180.0120.00316.63
8.2.170.0070.00722.96
8.2.160.0070.00720.54
8.2.150.0080.00024.18
8.2.140.0150.00424.66
8.2.130.0070.00026.16
8.2.120.0140.00021.08
8.2.110.0040.00422.32
8.2.100.0080.00418.16
8.2.90.0040.00419.41
8.2.80.0000.00817.97
8.2.70.0070.00417.88
8.2.60.0040.00418.05
8.2.50.0040.00418.07
8.2.40.0040.00419.85
8.2.30.0020.00518.33
8.2.20.0030.00518.07
8.2.10.0050.00218.14
8.2.00.0040.00418.02
8.1.280.0110.01125.92
8.1.270.0040.00423.97
8.1.260.0040.00426.35
8.1.250.0070.01128.09
8.1.240.0090.00023.97
8.1.230.0080.00419.16
8.1.220.0050.00317.74
8.1.210.0050.00318.77
8.1.200.0000.00917.50
8.1.190.0000.00817.50
8.1.180.0070.00318.10
8.1.170.0000.00918.59
8.1.160.0050.00222.04
8.1.150.0080.00018.80
8.1.140.0000.00717.56
8.1.130.0030.00317.79
8.1.120.0000.00717.54
8.1.110.0030.00617.66
8.1.100.0040.00317.55
8.1.90.0000.00817.62
8.1.80.0000.00817.51
8.1.70.0030.00317.55
8.1.60.0040.00417.74
8.1.50.0030.00517.63
8.1.40.0050.00517.57
8.1.30.0050.00517.81
8.1.20.0050.00217.69
8.1.10.0050.00317.84
8.1.00.0040.00417.61
8.0.300.0000.00718.77
8.0.290.0040.00417.29
8.0.280.0030.00318.58
8.0.270.0030.00317.22
8.0.260.0000.00717.28
8.0.250.0000.00717.24
8.0.240.0060.00317.11
8.0.230.0030.00317.11
8.0.220.0000.00716.98
8.0.210.0030.00417.02
8.0.200.0000.00717.06
8.0.190.0000.00717.05
8.0.180.0040.00417.02
8.0.170.0000.00817.13
8.0.160.0040.00417.05
8.0.150.0050.00217.06
8.0.140.0000.00816.96
8.0.130.0080.00013.53
8.0.120.0040.00416.96
8.0.110.0000.00717.02
8.0.100.0000.00817.15
8.0.90.0020.00517.07
8.0.80.0090.00617.11
8.0.70.0050.00317.07
8.0.60.0000.00717.15
8.0.50.0080.00017.00
8.0.30.0090.01117.29
8.0.20.0090.01117.40
8.0.10.0040.00417.22
8.0.00.0140.00416.97
7.4.330.0050.00015.20
7.4.320.0040.00416.84
7.4.300.0070.00016.72
7.4.290.0000.00816.70
7.4.280.0030.00316.69
7.4.270.0040.00316.69
7.4.260.0040.00416.80
7.4.250.0000.00716.59
7.4.240.0020.00516.73
7.4.230.0030.00316.63
7.4.220.0090.00916.69
7.4.210.0080.00816.85
7.4.200.0080.00016.84
7.4.160.0060.00916.82
7.4.150.0110.01217.40
7.4.140.0190.00217.86
7.4.130.0080.01016.85
7.4.120.0050.01116.81
7.4.110.0100.00716.84
7.4.100.0150.00416.64
7.4.90.0110.00816.50
7.4.80.0150.00619.39
7.4.70.0000.01616.78
7.4.60.0080.00816.94
7.4.50.0000.00416.76
7.4.40.0120.00616.73
7.4.30.0040.01216.80
7.4.00.0090.00715.26
7.3.330.0000.00713.44
7.3.320.0030.00313.43
7.3.310.0040.00416.54
7.3.300.0050.00316.55
7.3.290.0060.00916.58
7.3.280.0090.01016.61
7.3.270.0160.00317.40
7.3.260.0090.00916.56
7.3.250.0090.00816.54
7.3.240.0040.01216.43
7.3.230.0140.00316.61
7.3.210.0090.00916.64
7.3.200.0100.01419.39
7.3.190.0110.01016.64
7.3.180.0190.00016.63
7.3.170.0140.00716.71
7.3.160.0100.00716.73
7.3.120.0070.01115.10
7.3.110.0070.00914.88
7.3.100.0070.00815.08
7.3.90.0050.00814.99
7.3.80.0050.01515.08
7.3.70.0070.01015.09
7.3.60.0060.00915.14
7.3.50.0060.00814.95
7.3.40.0080.00814.87
7.3.30.0090.00514.81
7.3.20.0050.00716.86
7.3.10.0100.00416.94
7.3.00.0040.00916.90
7.2.330.0070.01116.89
7.2.320.0130.01016.57
7.2.310.0240.00016.80
7.2.300.0060.01116.98
7.2.290.0120.00916.58
7.2.250.0110.00815.23
7.2.240.0040.01414.95
7.2.230.0090.01015.28
7.2.220.0060.00815.31
7.2.210.0050.01315.32
7.2.200.0080.00715.30
7.2.190.0050.00915.33
7.2.180.0070.00715.27
7.2.170.0080.00915.08
7.2.160.0030.01315.28
7.2.150.0040.00717.10
7.2.140.0030.01416.96
7.2.130.0100.00716.95
7.2.120.0030.00817.00
7.2.110.0080.00417.04
7.2.100.0000.01816.89
7.2.90.0100.00017.21
7.2.80.0120.00317.00
7.2.70.0090.00417.03
7.2.60.0000.01617.09
7.2.50.0060.00617.23
7.2.40.0070.01117.13
7.2.30.0030.01016.64
7.2.20.0060.00617.00
7.2.10.0080.01116.85
7.2.00.0050.00918.04
7.1.330.0070.00715.97
7.1.320.0030.01216.08
7.1.310.0060.00715.73
7.1.300.0060.00516.08
7.1.290.0050.00815.92
7.1.280.0080.00615.98
7.1.270.0080.00316.09
7.1.260.0050.00915.85
7.1.250.0100.00716.06
7.1.240.0070.00315.82
7.1.230.0090.00616.03
7.1.220.0030.01116.17
7.1.210.0110.00416.03
7.1.200.0030.00716.13
7.1.190.0040.01215.90
7.1.180.0000.00916.04
7.1.170.0000.00816.05
7.1.160.0070.00716.14
7.1.150.0110.00315.83
7.1.140.0030.01016.02
7.1.130.0130.00015.95
7.1.120.0060.00615.96
7.1.110.0030.00915.85
7.1.100.0000.01417.06
7.1.90.0030.00815.96
7.1.80.0100.00316.16
7.1.70.0050.00716.60
7.1.60.0080.00917.75
7.1.50.0080.01216.66
7.1.40.0090.00016.05
7.1.30.0100.00715.86
7.1.20.0060.00616.05
7.1.10.0090.00316.08
7.1.00.0050.04219.13
7.0.330.0070.01015.64
7.0.320.0090.00615.45
7.0.310.0080.00015.68
7.0.300.0000.01315.58
7.0.290.0080.00815.70
7.0.280.0040.00815.40
7.0.270.0060.00615.83
7.0.260.0040.00415.80
7.0.250.0070.00315.60
7.0.240.0000.00815.82
7.0.230.0030.00615.43
7.0.220.0050.00515.57
7.0.210.0030.01315.75
7.0.200.0150.00215.16
7.0.190.0090.00315.66
7.0.180.0000.01515.60
7.0.170.0070.00715.87
7.0.160.0030.00715.62
7.0.150.0060.00315.61
7.0.140.0080.03818.84
7.0.130.0090.00315.30
7.0.120.0040.01215.48
7.0.110.0000.01515.43
7.0.100.0030.01015.30
7.0.90.0060.00315.57
7.0.80.0030.00915.60
7.0.70.0000.00815.55
7.0.60.0080.04217.67
7.0.50.0090.02716.84
7.0.40.0040.04916.93
7.0.30.0150.03516.88
7.0.20.0130.04217.03
7.0.10.0050.04216.88
7.0.00.0050.04816.99
5.6.400.0030.00614.65
5.6.390.0060.00614.63
5.6.380.0050.00514.30
5.6.370.0090.00613.97
5.6.360.0040.00914.38
5.6.350.0070.00714.54
5.6.340.0040.00714.27
5.6.330.0000.01514.45
5.6.320.0070.00314.45
5.6.310.0100.00714.30
5.6.300.0060.01014.66
5.6.290.0070.00314.41
5.6.280.0100.03717.93
5.6.270.0130.00314.63
5.6.260.0070.01014.39
5.6.250.0100.00314.25
5.6.240.0030.01014.59
5.6.230.0090.00914.61
5.6.220.0000.01414.43
5.6.210.0040.02517.50
5.6.200.0080.04516.26
5.6.190.0050.02317.55
5.6.180.1480.01717.43
5.6.170.0170.04017.40
5.6.160.0140.03717.46
5.6.150.0160.03516.26
5.6.140.0080.03416.31
5.6.130.0070.04516.23
5.6.120.0050.03317.92
5.6.110.0080.04317.77
5.6.100.0070.04017.87
5.6.90.0020.03917.76
5.6.80.0070.02317.19
5.6.70.2270.02217.25
5.6.60.0030.00914.57
5.6.50.0090.00314.00
5.6.40.0040.01114.27
5.6.30.0050.00314.38
5.6.20.0100.00714.40
5.6.10.0060.00614.39
5.6.00.0080.00514.40
5.5.380.0030.01014.36
5.5.370.0040.00714.52
5.5.360.0080.00814.54
5.5.350.0070.03717.41
5.5.340.0020.04816.13
5.5.330.0050.02317.23
5.5.320.1600.02317.36
5.5.310.0070.02517.52
5.5.300.0030.02816.10
5.5.290.0030.03016.15
5.5.280.0100.03817.50
5.5.270.0060.02817.52
5.5.260.0130.04017.39
5.5.250.0080.03117.39
5.5.240.0190.03417.26
5.5.230.0030.01014.31
5.5.220.0100.00314.38
5.5.210.0030.01014.23
5.5.200.0050.00314.29
5.5.190.0070.00714.27
5.5.180.0100.00314.19
5.5.170.0030.01014.29
5.5.160.0110.00314.07
5.5.150.0000.01014.13
5.5.140.0030.00714.35
5.5.130.0060.00913.91
5.5.120.0030.00714.15
5.5.110.0040.00714.41
5.5.100.0110.00414.31
5.5.90.0030.01014.29
5.5.80.0000.01114.15
5.5.70.0040.00414.05
5.5.60.0070.00714.35
5.5.50.0100.00714.47
5.5.40.0100.00614.18
5.5.30.0030.00814.17
5.5.20.0060.00614.39
5.5.10.0000.01313.80
5.5.00.0030.01014.34
5.4.450.0130.02320.43
5.4.440.0200.02020.42
5.4.430.0380.03115.99
5.4.420.0130.02520.42
5.4.410.0080.02720.42
5.4.400.0120.02220.21
5.4.390.0240.02019.93
5.4.380.0060.03315.58
5.4.370.0130.02815.57
5.4.360.0080.02915.67
5.4.350.0120.03115.65
5.4.340.0050.03515.53
5.4.330.0000.00912.57
5.4.320.0050.02112.54
5.4.310.0050.02212.53
5.4.300.0040.02112.54
5.4.290.0040.02512.53
5.4.280.0070.02012.48
5.4.270.0070.02212.48
5.4.260.0070.01912.48
5.4.250.0090.01912.48
5.4.240.0040.02312.48
5.4.230.0040.02312.48
5.4.220.0060.02312.48
5.4.210.0050.02212.48
5.4.200.0060.02212.48
5.4.190.0100.02012.48
5.4.180.0070.02412.48
5.4.170.0060.02812.48
5.4.160.0050.02812.48
5.4.150.0050.02712.48
5.4.140.0050.03112.32
5.4.130.0050.02812.31
5.4.120.0080.02612.29
5.4.110.0050.02812.29
5.4.100.0060.02812.29
5.4.90.0040.03112.29
5.4.80.0050.02612.29
5.4.70.0050.02812.29
5.4.60.0080.02512.29
5.4.50.0040.03012.29
5.4.40.0080.02512.28
5.4.30.0050.02612.28
5.4.20.0050.02712.28
5.4.10.0050.02812.28
5.4.00.0060.02612.03
5.3.290.0040.02312.68
5.3.280.0040.02812.63
5.3.270.0060.03112.65
5.3.260.0070.02912.64
5.3.250.0050.02712.64
5.3.240.0050.02012.64
5.3.230.0030.02312.64
5.3.220.0050.02912.63
5.3.210.0080.02112.63
5.3.200.0050.02212.62
5.3.190.0100.02112.62
5.3.180.0070.02312.62
5.3.170.0040.02512.62
5.3.160.0060.02312.62
5.3.150.0050.02512.62
5.3.140.0070.02512.61
5.3.130.0030.02512.61
5.3.120.0060.02412.61
5.3.110.0060.02212.61
5.3.100.0060.02312.35
5.3.90.0040.02612.34
5.3.80.0060.02612.33
5.3.70.0080.02312.33
5.3.60.0070.01912.33
5.3.50.0040.02912.30
5.3.40.0070.02012.30
5.3.30.0080.01912.28
5.3.20.0070.02012.17
5.3.10.0050.02212.15
5.3.00.0040.02812.15
5.2.170.0040.0309.23
5.2.160.0030.0309.23
5.2.150.0040.0319.23
5.2.140.0050.0319.22
5.2.130.0090.0319.19
5.2.120.0050.0299.18
5.2.110.0050.0299.20
5.2.100.0020.0319.19
5.2.90.0050.0299.19
5.2.80.0030.0329.18
5.2.70.0060.0299.18
5.2.60.0090.0269.14
5.2.50.0030.0329.11
5.2.40.0060.0299.09
5.2.30.0040.0309.07
5.2.20.0030.0309.05
5.2.10.0030.0308.94
5.2.00.0040.0308.80
5.1.60.0040.0258.09
5.1.50.0030.0268.08
5.1.40.0060.0228.06
5.1.30.0040.0268.41
5.1.20.0040.0288.43
5.1.10.0070.0248.16
5.1.00.0060.0248.16
5.0.50.0040.0216.64
5.0.40.0010.0226.50
5.0.30.0050.0296.31
5.0.20.0040.0186.28
5.0.10.0020.0216.25
5.0.00.0040.0316.25
4.4.90.0020.0174.78
4.4.80.0060.0134.76
4.4.70.0040.0144.75
4.4.60.0020.0174.76
4.4.50.0010.0174.77
4.4.40.0050.0274.71
4.4.30.0030.0194.76
4.4.20.0010.0174.84
4.4.10.0040.0144.85
4.4.00.0020.0254.76
4.3.110.0020.0164.66
4.3.100.0020.0204.66
4.3.90.0040.0164.63
4.3.80.0000.0284.58
4.3.70.0030.0154.63
4.3.60.0010.0164.63
4.3.50.0060.0134.63
4.3.40.0050.0284.54
4.3.30.0020.0163.30
4.3.20.0020.0173.28
4.3.10.0040.0153.24
4.3.00.0200.01727.24

preferences:
38.1 ms | 401 KiB | 5 Q