3v4l.org

run code in 300+ PHP versions simultaneously
<?php if (!function_exists('json_encode')) { function json_encode($it) { if (!($is_arr = is_array($it)) && !is_object($it)) { return _js_enc_value($it); } $assoc = false; $i = 0; foreach ($it as $k => $v) { if ($k !== $i) { $assoc = true; break; } $i++; } if (!$is_arr) { $assoc = true; } $data = array(); foreach ($it as $k => $v) { $k = '"'. addcslashes($k, '"\\') . '"'; $v = _js_enc_value($v); $data[] = $assoc ? $k . ':' . $v : $v; } if ($assoc) { $spl = '{'; $spr = '}'; } else { $spl = '['; $spr = ']'; } return $spl . implode(',', $data) . $spr; } function _js_enc_value($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): return 'null'; case is_string($value): return '"' . _js_uc_esc($value) . '"'; default: return $value; } } function _js_uc_esc($value) { $pattern = "/\r|(\n)|((?:[^\x09\x0A\x0D\x20-\x7E]{3})+)/"; return preg_replace_callback($pattern, '_js_uc_esc_cb', $value); } function _js_uc_esc_cb($matches) { switch (true) { case isset($matches[2]): $char = mb_convert_encoding($matches[2], '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 $str; case isset($matches[1]): return '\\n'; default: return '\\r'; } } } $var = array( 0 => array('text', 1, 1.1, true, false, null, array(), new stdClass, @fopen('php://stdin', 'r')), 2 => array('a' => 'hoge', 'b' => 'foo'), ); var_dump(json_encode($var));

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)
8.3.70.0040.01518.30
8.3.60.0100.01018.68
8.3.50.0050.01422.04
8.3.40.0070.01318.85
8.3.30.0110.00319.02
8.3.20.0070.00020.16
8.3.10.0070.00023.61
8.3.00.0040.00422.52
8.2.180.0130.00616.75
8.2.170.0070.00722.96
8.2.160.0030.01322.11
8.2.150.0040.00424.18
8.2.140.0040.00424.66
8.2.130.0040.00426.16
8.2.120.0040.00417.74
8.2.110.0060.00322.08
8.2.100.0030.01017.72
8.2.90.0060.00319.17
8.2.80.0040.00417.97
8.2.70.0130.00017.48
8.2.60.0090.00318.03
8.2.50.0040.00418.07
8.2.40.0040.00418.22
8.2.30.0000.00818.07
8.2.20.0040.00417.73
8.2.10.0040.00417.86
8.2.00.0000.00717.79
8.1.280.0090.00625.92
8.1.270.0130.00623.96
8.1.260.0030.00526.35
8.1.250.0080.00028.09
8.1.240.0060.00323.72
8.1.230.0070.00419.09
8.1.220.0080.00017.74
8.1.210.0040.00418.77
8.1.200.0060.00317.21
8.1.190.0040.00417.50
8.1.180.0030.00518.10
8.1.170.0000.00918.47
8.1.160.0000.00822.07
8.1.150.0000.00818.69
8.1.140.0040.00417.50
8.1.130.0000.00717.87
8.1.120.0050.00317.49
8.1.110.0040.00817.38
8.1.100.0000.00717.50
8.1.90.0040.00417.58
8.1.80.0040.00417.41
8.1.70.0000.00717.51
8.1.60.0040.00417.61
8.1.50.0040.00417.46
8.1.40.0040.00417.47
8.1.30.0030.00617.72
8.1.20.0040.00417.61
8.1.10.0040.00417.56
8.1.00.0040.00417.43
8.0.300.0050.00218.77
8.0.290.0000.00717.18
8.0.280.0000.00718.53
8.0.270.0070.00017.47
8.0.260.0030.00316.79
8.0.250.0030.00316.99
8.0.240.0000.00717.03
8.0.230.0080.00016.99
8.0.220.0030.00316.90
8.0.210.0000.00817.04
8.0.200.0000.00717.02
8.0.190.0040.00416.92
8.0.180.0040.00416.87
8.0.170.0040.00416.91
8.0.160.0000.00816.96
8.0.150.0030.00316.99
8.0.140.0000.00816.94
8.0.130.0000.00813.35
8.0.120.0070.00016.98
8.0.110.0040.00416.99
8.0.100.0000.00716.89
8.0.90.0050.00216.93
8.0.80.0090.00616.99
8.0.70.0060.00316.95
8.0.60.0000.00716.88
8.0.50.0000.00816.93
8.0.30.0120.00917.19
8.0.20.0080.01017.40
8.0.10.0000.00717.10
8.0.00.0070.01116.73
7.4.330.0050.00015.15
7.4.320.0000.00716.57
7.4.300.0060.00016.72
7.4.290.0000.00816.53
7.4.280.0030.00316.43
7.4.270.0030.00316.53
7.4.260.0070.00016.58
7.4.250.0000.00816.60
7.4.240.0040.00416.58
7.4.230.0070.00016.52
7.4.220.0130.00516.63
7.4.210.0100.00916.65
7.4.200.0030.00616.71
7.4.190.0040.00416.71
7.4.160.0080.01216.55
7.4.150.0140.00917.40
7.4.140.0050.01317.86
7.4.130.0090.00816.54
7.4.120.0120.00916.69
7.4.110.0090.00816.36
7.4.100.0120.01216.52
7.4.90.0030.01916.52
7.4.80.0180.00016.69
7.4.70.0060.01216.62
7.4.60.0070.01016.50
7.4.50.0050.00316.61
7.4.40.0080.00522.77
7.4.30.0080.00816.39
7.4.00.0120.00314.93
7.3.330.0030.00313.30
7.3.320.0030.00313.36
7.3.310.0030.00316.36
7.3.300.0030.00316.35
7.3.290.0120.00316.33
7.3.280.0090.01016.37
7.3.270.0150.00917.40
7.3.260.0090.00916.55
7.3.250.0090.01016.26
7.3.240.0230.00316.38
7.3.230.0120.00616.39
7.3.210.0110.00616.22
7.3.200.0160.00619.39
7.3.190.0100.00616.39
7.3.180.0070.01016.62
7.3.170.0060.01016.54
7.3.160.0060.01116.30
7.3.120.0000.01514.50
7.2.330.0060.01216.51
7.2.320.0110.00616.60
7.2.310.0050.01116.63
7.2.300.0180.00616.43
7.2.290.0120.00916.42
7.2.00.0090.00918.57
7.1.100.0000.01117.96
7.1.70.0030.00617.09
7.1.60.0180.00719.24
7.1.50.0090.00316.93
7.1.00.0070.07322.28
7.0.200.0060.00616.74
7.0.140.0070.08722.01
7.0.90.0630.07019.98
7.0.80.0470.05320.01
7.0.70.0300.04320.05
7.0.60.0470.07719.98
7.0.50.0630.08020.33
7.0.40.0000.07020.16
7.0.30.0070.08720.07
7.0.20.0130.05320.00
7.0.10.0070.08020.01
7.0.00.0100.04320.17
5.6.280.0000.07321.14
5.6.230.0030.04320.70
5.6.220.0000.05320.51
5.6.210.0030.05720.47
5.6.200.0170.06721.13
5.6.190.0030.05721.10
5.6.180.0070.08721.05
5.6.170.0100.09321.06
5.6.160.0070.07721.06
5.6.150.0030.08021.19
5.6.140.0100.07721.14
5.6.130.0100.08321.05
5.6.120.0100.08021.09
5.6.110.0030.05321.05
5.6.100.0070.05721.03
5.6.90.0100.04321.11
5.6.80.0070.08320.34
5.6.70.0070.04720.54
5.6.60.0030.08020.42
5.6.50.0070.05020.37
5.6.40.0030.08020.51
5.6.30.0170.03320.40
5.6.20.0070.08020.33
5.6.10.0070.05320.33
5.6.00.0100.06320.43
5.5.370.0200.05720.39
5.5.360.0170.05720.37
5.5.350.0030.08020.38
5.5.340.0030.05720.88
5.5.330.0070.08020.85
5.5.320.0030.08320.85
5.5.310.0070.08020.79
5.5.300.0070.08320.66
5.5.290.0030.08020.91
5.5.280.0030.04320.66
5.5.270.0230.06720.83
5.5.260.0070.08020.88
5.5.250.0030.05320.69
5.5.240.0100.08020.23
5.5.230.0070.08720.15
5.5.220.0100.05720.03
5.5.210.0100.08720.13
5.5.200.0070.06320.27
5.5.190.0170.06720.10
5.5.180.0030.08720.13
5.5.160.0130.06020.01
5.5.150.0130.07320.23
5.5.140.0130.06320.29
5.5.130.0130.07020.20
5.5.120.0000.05720.24
5.5.110.0070.07720.23
5.5.100.0100.07720.09
5.5.90.0130.06719.96
5.5.80.0070.07320.06
5.5.70.0070.06020.09
5.5.60.0000.08320.10
5.5.50.0030.05020.11
5.5.40.0100.07320.07
5.5.30.0130.07020.06
5.5.20.0130.07020.16
5.5.10.0130.06320.04
5.5.00.0070.07720.09
5.4.450.0070.04719.36
5.4.440.0070.07319.54
5.4.430.0200.06319.37
5.4.420.0000.08019.44
5.4.410.0100.07719.34
5.4.400.0070.07718.91
5.4.390.0030.05018.85
5.4.380.0100.06018.87
5.4.370.0070.06719.16
5.4.360.0030.05019.12
5.4.350.0030.04718.88
5.4.340.0070.07319.16
5.4.320.0130.05318.90
5.4.310.0130.06719.14
5.4.300.0200.06318.87
5.4.290.0100.04018.84
5.4.280.0100.06719.20
5.4.270.0100.07019.02
5.4.260.0070.07718.85
5.4.250.0070.07319.04
5.4.240.0130.07019.17
5.4.230.0170.06319.04
5.4.220.0070.07319.04
5.4.210.0170.06319.04
5.4.200.0070.07019.13
5.4.190.0030.07319.13
5.4.180.0130.06019.11
5.4.170.0200.06319.03
5.4.160.0000.08319.02
5.4.150.0130.04318.98
5.4.140.0070.04316.50
5.4.130.0200.02716.43
5.4.120.0070.06716.18
5.4.110.0070.07716.58
5.4.100.0030.07716.46
5.4.90.0200.05716.56
5.4.80.0000.04716.55
5.4.70.0070.04016.38
5.4.60.0000.06716.46
5.4.50.0170.03716.44
5.4.40.0070.04716.38
5.4.30.0100.06316.45
5.4.20.0100.07016.32
5.4.10.0000.04716.44
5.4.00.0100.07015.87
5.3.290.0070.07714.75
5.3.280.0100.07014.59
5.3.270.0130.04714.63
5.3.260.0100.07714.60
5.3.250.0070.06014.66
5.3.240.0130.07014.57
5.3.230.0000.08014.58
5.3.220.0070.05014.66
5.3.210.0100.06714.71
5.3.200.0030.07314.60
5.3.190.0070.07014.66
5.3.180.0070.07014.55
5.3.170.0070.05714.60
5.3.160.0070.05014.71
5.3.150.0130.05014.56
5.3.140.0130.05714.64
5.3.130.0070.05714.55
5.3.120.0030.08014.58
5.3.110.0070.07314.55
5.3.100.0030.07714.18
5.3.90.0030.05713.99
5.3.80.0100.06314.07
5.3.70.0170.06314.07
5.3.60.0230.05314.05
5.3.50.0070.05714.00
5.3.40.0030.04713.99
5.3.30.0030.07013.96
5.3.20.0100.07313.65
5.3.10.0000.06013.61
5.3.00.0100.07313.71
5.2.170.0100.05311.19
5.2.160.0070.06011.09
5.2.150.0100.03011.06
5.2.140.0030.04011.07
5.2.130.0030.06010.99
5.2.120.0070.05311.14
5.2.110.0000.04711.24
5.2.100.0070.06011.18
5.2.90.0100.05011.15
5.2.80.0070.05311.13
5.2.70.0130.05711.18
5.2.60.0070.05311.14
5.2.50.0070.03011.12
5.2.40.0100.05310.94
5.2.30.0170.03711.12
5.2.20.0070.06011.10
5.2.10.0070.03011.03
5.2.00.0100.05710.87
5.1.60.0070.04710.72
5.1.50.0030.05310.72
5.1.40.0030.05010.72
5.1.30.0130.04010.72
5.1.20.0000.05310.72
5.1.10.0030.04710.72
5.1.00.0030.03010.72
5.0.50.0030.04710.72
5.0.40.0030.02710.72
5.0.30.0000.06710.72
5.0.20.0100.04010.72
5.0.10.0100.04010.72
5.0.00.0030.04710.72
4.4.90.0070.02710.72
4.4.80.0000.04010.72
4.4.70.0000.03310.72
4.4.60.0000.03710.72
4.4.50.0030.03010.72
4.4.40.0030.04010.72
4.4.30.0070.02310.72
4.4.20.0030.01710.72
4.4.10.0000.02010.72
4.4.00.0030.05010.72
4.3.110.0000.02310.72
4.3.100.0000.02310.72
4.3.90.0030.02010.72
4.3.80.0100.04310.72
4.3.70.0030.03310.72
4.3.60.0030.03310.72
4.3.50.0000.04010.72
4.3.40.0000.06010.72
4.3.30.0000.03710.72
4.3.20.0000.03310.72
4.3.10.0000.03710.72
4.3.00.0030.03310.72

preferences:
64.22 ms | 401 KiB | 5 Q