3v4l.org

run code in 300+ PHP versions simultaneously
<?php if (!function_exists('json_encode')) { function json_encode($it) { if (!($assoc = is_object($it)) && !is_array($it)) { return _js_enc_value($it); } $i = 0; $it = (array)$it; if (!$assoc) { foreach ($it as $k => $v) { if ($k !== $i) { $assoc = true; break; } $i++; } } $data = array(); foreach ($it as $k => $v) { $v = _js_enc_value($v); if ($assoc) { $k = _js_enc_value($k); $data[] = $k . ':' . $v; } else { $data[] = $v; } } if ($assoc) { $bl = '{'; $br = '}'; } else { $bl = '['; $br = ']'; } return $bl . implode(',', $data) . $br; } function _js_enc_value($value) { switch (true) { case is_array($value): case is_object($value): return json_encode($value); case is_bool($value): return $value ? 'true' : 'false'; case $value === null: case is_resource($value) && _js_error(): return 'null'; case is_string($value): return '"' . _js_uc_esc($value) . '"'; default: return $value; } } function _js_error() { return trigger_error( 'json_encode(): type is unsupported, encoded as null', E_USER_WARNING ); } function _js_uc_esc($value) { $pattern = "@[\x08-x010\x0c\x0d\\\\\"'/]|([ -!#-&(-.])++@"; return preg_replace_callback($pattern, '_js_uc_esc_cb', $value); } function _js_uc_esc_cb($matches) { switch (true) { case isset($matches[1]): $char = mb_convert_encoding($matches[0], 'UTF-16', 'UTF-8'); $str = ''; $len = strlen($char); for ($i = 0; $i < $len; $i += 2) { $str .= sprintf('\\u%02x%02x', ord($char[$i]), ord($char[$i + 1]) ); } return $str; default: return addcslashes($matches[0], "\x08\x09\x10\x0c\x0d\\\"'/"); } } } $str = ''; for ($i=0;$i<=32;$i++) { $str .= chr($i); } $str = chr(127); var_dump(json_encode("@'^[]|~"));

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)
8.3.60.0070.00716.88
8.3.50.0120.01222.00
8.3.40.0070.01118.89
8.3.30.0110.00319.27
8.3.20.0050.00320.30
8.3.10.0030.01223.59
8.3.00.0030.00519.51
8.2.180.0130.00316.50
8.2.170.0040.01522.96
8.2.160.0110.00720.29
8.2.150.0030.00624.18
8.2.140.0110.00424.66
8.2.130.0070.00726.16
8.2.120.0030.00522.11
8.2.110.0060.00322.11
8.2.100.0100.00317.72
8.2.90.0050.00319.04
8.2.80.0000.00817.97
8.2.70.0050.00517.63
8.2.60.0000.00818.16
8.2.50.0050.00318.07
8.2.40.0080.00019.88
8.2.30.0030.00518.29
8.2.20.0030.00517.83
8.2.10.0000.00818.04
8.2.00.0070.00317.80
8.1.280.0120.00325.92
8.1.270.0130.00623.82
8.1.260.0140.00326.35
8.1.250.0150.00028.09
8.1.240.0000.01023.91
8.1.230.0120.00019.35
8.1.220.0050.00317.74
8.1.210.0040.00418.77
8.1.200.0090.00017.13
8.1.190.0000.00817.36
8.1.180.0030.00619.01
8.1.170.0060.00318.71
8.1.160.0000.00822.14
8.1.150.0080.00018.62
8.1.140.0080.00017.45
8.1.130.0030.00317.89
8.1.120.0020.00517.43
8.1.110.0030.00517.51
8.1.100.0000.00817.48
8.1.90.0000.00717.43
8.1.80.0070.00017.41
8.1.70.0000.00717.50
8.1.60.0030.00617.63
8.1.50.0040.00417.48
8.1.40.0030.00717.61
8.1.30.0000.00917.66
8.1.20.0030.00517.69
8.1.10.0000.00917.57
8.1.00.0000.00817.45
8.0.300.0040.00418.77
8.0.290.0040.00417.28
8.0.280.0000.00718.49
8.0.270.0040.00417.32
8.0.260.0070.00017.32
8.0.250.0000.00716.94
8.0.240.0000.00716.99
8.0.230.0040.00416.94
8.0.220.0050.00216.94
8.0.210.0000.00716.94
8.0.200.0060.00017.00
8.0.190.0000.00716.99
8.0.180.0040.00417.01
8.0.170.0070.00017.02
8.0.160.0080.00017.09
8.0.150.0040.00416.86
8.0.140.0000.00716.89
8.0.130.0030.00313.37
8.0.120.0000.00816.93
8.0.110.0000.00716.86
8.0.100.0040.00416.93
8.0.90.0080.00016.74
8.0.80.0090.01216.86
8.0.70.0050.00216.89
8.0.60.0070.00016.99
8.0.50.0000.00716.97
8.0.30.0090.01017.33
8.0.20.0150.00817.40
8.0.10.0050.00316.95
8.0.00.0110.01116.76
7.4.330.0070.00015.00
7.4.320.0030.00316.47
7.4.300.0030.00316.57
7.4.290.0030.00316.67
7.4.280.0000.00716.46
7.4.270.0000.00716.58
7.4.260.0000.00716.55
7.4.250.0080.00016.59
7.4.240.0000.00716.62
7.4.230.0030.00316.76
7.4.220.0090.00916.53
7.4.210.0070.00916.56
7.4.200.0000.00716.68
7.4.190.0040.00416.55
7.4.160.0140.00416.68
7.4.150.0120.00617.40
7.4.140.0070.01017.86
7.4.130.0100.00816.56
7.4.120.0080.01016.66
7.4.110.0090.00916.54
7.4.100.0170.00616.46
7.4.90.0000.01816.42
7.4.80.0140.00719.39
7.4.70.0070.01016.41
7.4.60.0130.00516.30
7.4.50.0000.00816.62
7.4.40.0070.01016.51
7.4.30.0030.01316.47
7.4.00.0060.00914.98
7.3.330.0000.00613.18
7.3.320.0050.00013.22
7.3.310.0040.00416.31
7.3.300.0000.00716.23
7.3.290.0130.00316.32
7.3.280.0110.00516.32
7.3.270.0140.00417.40
7.3.260.0140.00916.63
7.3.250.0130.00816.51
7.3.240.0100.00616.32
7.3.230.0050.01116.45
7.3.210.0090.00916.35
7.3.200.0180.00619.39
7.3.190.0040.01716.63
7.3.180.0090.00616.61
7.3.170.0120.00916.64
7.3.160.0120.00316.43
7.3.120.0040.00814.94
7.2.330.0120.00616.63
7.2.320.0070.01116.67
7.2.310.0110.00616.86
7.2.300.0110.00616.53
7.2.290.0070.01416.81
7.2.00.0000.01419.17
7.1.100.0060.00617.95
7.1.70.0040.00417.34
7.1.60.0090.00919.46
7.1.50.0110.01116.92
7.1.00.0000.07722.31
7.0.200.0030.00316.63
7.0.140.0000.07022.07
7.0.90.0430.08719.99
7.0.80.0600.07320.01
7.0.70.0600.08719.97
7.0.60.0400.08719.84
7.0.50.0070.04320.33
7.0.40.0130.07320.14
7.0.30.0070.08720.05
7.0.20.0170.07020.05
7.0.10.0070.08720.03
7.0.00.0030.05720.14
5.6.280.0030.07321.16
5.6.230.0100.06020.59
5.6.220.0070.08720.64
5.6.210.0070.07720.65
5.6.200.0070.05321.19
5.6.190.0100.05321.05
5.6.180.0070.07720.94
5.6.170.0030.06320.97
5.6.160.0100.07720.97
5.6.150.0170.06021.20
5.6.140.0130.07321.15
5.6.130.0030.07021.09
5.6.120.0030.05320.97
5.6.110.0070.06721.09
5.6.100.0130.07721.07
5.6.90.0030.04721.00
5.6.80.0100.07720.57
5.6.70.0130.07020.53
5.6.60.0000.08320.43
5.6.50.0030.07720.36
5.6.40.0100.04320.40
5.6.30.0000.05020.40
5.6.20.0030.06020.47
5.6.10.0070.07720.40
5.6.00.0100.07720.43
5.5.370.0070.07320.33
5.5.360.0130.07720.40
5.5.350.0070.08020.36
5.5.340.0030.08320.95
5.5.330.0100.07720.89
5.5.320.0030.08320.92
5.5.310.0030.05320.82
5.5.300.0130.07320.94
5.5.290.0030.08320.93
5.5.280.0100.05320.91
5.5.270.0070.07720.88
5.5.260.0130.04720.89
5.5.250.0130.07320.72
5.5.240.0070.08320.20
5.5.230.0070.08320.17
5.5.220.0000.08320.19
5.5.210.0170.05720.31
5.5.200.0100.07020.15
5.5.190.0070.05320.27
5.5.180.0130.07320.12
5.5.160.0100.04720.20
5.5.150.0030.08020.19
5.5.140.0200.06720.16
5.5.130.0130.07319.99
5.5.120.0170.06720.25
5.5.110.0130.03720.23
5.5.100.0130.07320.12
5.5.90.0030.04320.13
5.5.80.0070.07720.09
5.5.70.0070.07720.09
5.5.60.0030.06020.10
5.5.50.0070.08020.07
5.5.40.0130.05320.07
5.5.30.0070.07720.07
5.5.20.0030.04320.16
5.5.10.0000.06320.04
5.5.00.0100.05720.14
5.4.450.0000.08019.39
5.4.440.0130.03319.20
5.4.430.0100.05319.55
5.4.420.0100.05019.36
5.4.410.0170.07019.10
5.4.400.0100.05019.05
5.4.390.0070.07718.90
5.4.380.0100.07719.20
5.4.370.0170.06718.88
5.4.360.0130.06319.02
5.4.350.0030.05019.12
5.4.340.0070.08019.14
5.4.320.0030.07719.19
5.4.310.0100.06719.13
5.4.300.0030.07718.84
5.4.290.0070.05319.15
5.4.280.0100.04019.20
5.4.270.0100.07018.84
5.4.260.0100.06719.12
5.4.250.0130.04319.22
5.4.240.0100.07018.89
5.4.230.0030.08018.84
5.4.220.0000.08019.20
5.4.210.0170.05319.04
5.4.200.0130.03719.12
5.4.190.0030.04019.03
5.4.180.0070.06319.17
5.4.170.0130.04019.23
5.4.160.0030.06718.83
5.4.150.0030.05719.14
5.4.140.0070.05716.41
5.4.130.0130.06016.31
5.4.120.0100.03316.42
5.4.110.0030.04716.56
5.4.100.0070.07716.33
5.4.90.0030.07316.45
5.4.80.0100.07016.54
5.4.70.0030.07716.51
5.4.60.0070.07316.26
5.4.50.0070.06716.25
5.4.40.0030.03716.50
5.4.30.0030.03716.41
5.4.20.0030.04716.44
5.4.10.0100.05316.36
5.4.00.0100.05015.89
5.3.290.0030.05014.73
5.3.280.0100.07314.63
5.3.270.0170.06714.60
5.3.260.0130.04314.73
5.3.250.0100.06314.75
5.3.240.0100.04014.66
5.3.230.0030.06014.55
5.3.220.0130.06314.63
5.3.210.0030.04014.57
5.3.200.0030.08314.71
5.3.190.0070.06714.64
5.3.180.0030.08014.58
5.3.170.0030.05014.52
5.3.160.0000.08014.52
5.3.150.0100.04714.73
5.3.140.0030.04714.68
5.3.130.0070.03314.60
5.3.120.0000.04014.55
5.3.110.0030.08314.67
5.3.100.0070.04314.00
5.3.90.0070.03714.11
5.3.80.0070.04013.93
5.3.70.0070.07314.09
5.3.60.0030.04714.01
5.3.50.0000.08313.86
5.3.40.0070.07713.96
5.3.30.0070.03314.09
5.3.20.0130.04013.86
5.3.10.0100.06713.66
5.3.00.0130.06713.60
5.2.170.0030.06711.20
5.2.160.0070.06011.17
5.2.150.0000.04011.32
5.2.140.0070.03011.18
5.2.130.0030.03311.23
5.2.120.0200.04011.05
5.2.110.0000.06011.06
5.2.100.0070.06010.99
5.2.90.0130.05311.27
5.2.80.0100.05711.17
5.2.70.0030.06011.19
5.2.60.0000.05311.09
5.2.50.0100.06010.94
5.2.40.0030.05311.09
5.2.30.0070.04010.92
5.2.20.0030.05010.90
5.2.10.0030.06010.88
5.2.00.0030.06010.81
5.1.60.0100.03310.02
5.1.50.0100.03310.09
5.1.40.0070.0309.84
5.1.30.0070.05310.42
5.1.20.0000.04710.30
5.1.10.0070.04310.20
5.1.00.0070.03710.21
5.0.50.0000.0279.29
5.0.40.0100.0139.29
5.0.30.0070.0579.29
5.0.20.0000.0479.29
5.0.10.0030.0409.29
5.0.00.0000.0609.29
4.4.90.0000.0379.29
4.4.80.0000.0379.29
4.4.70.0030.0339.29
4.4.60.0030.0379.29
4.4.50.0000.0339.29
4.4.40.0000.0339.29
4.4.30.0000.0279.29
4.4.20.0030.0379.29
4.4.10.0030.0209.29
4.4.00.0030.0579.29
4.3.110.0030.0209.29
4.3.100.0030.0209.29
4.3.90.0070.0179.29
4.3.80.0030.0339.29
4.3.70.0000.0379.29
4.3.60.0000.0379.29
4.3.50.0030.0209.29
4.3.40.0070.0439.29
4.3.30.0100.0309.29
4.3.20.0030.0339.29
4.3.10.0000.0339.29
4.3.00.0000.0279.29

preferences:
45.49 ms | 401 KiB | 5 Q