3v4l.org

run code in 300+ PHP versions simultaneously
<?php if (!function_exists('json_encode')) { function json_encode($it) { if (!is_array($it) && !is_object($it)) { return _js_enc_value($it); } $assoc = false; $i = 0; foreach ($it as $k => $v) { if ($k !== $i) { $assoc = true; break; } $i++; } if (!isset($k)) { $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($value): return '"' . _js_uni_esc($value) . '"'; default: return $value; } } function _js_uni_esc($value) { $pattern = "/\r|(\n)|((?:[^\x09\x0A\x0D\x20-\x7E]{3})+)/"; return preg_replace_callback($pattern, '_js_uni_esc_cb', $value); } function _js_uni_esc_cb($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'; } } } $var = array( 0 => array('text', 1, 1.1, true, false, null, new stdClass), 2 => array('a' => 'hoge', 'b' => 'foo'), ); echo json_encode($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)
8.3.60.0040.01118.43
8.3.50.0100.00721.20
8.3.40.0000.01618.76
8.3.30.0150.00018.70
8.3.20.0040.00418.77
8.3.10.0080.00021.13
8.3.00.0040.00423.47
8.2.180.0090.00616.75
8.2.170.0090.00622.96
8.2.160.0070.00720.34
8.2.150.0060.00324.18
8.2.140.0040.00424.66
8.2.130.0050.00326.16
8.2.120.0040.00419.66
8.2.110.0000.01121.99
8.2.100.0030.00917.91
8.2.90.0000.00819.22
8.2.80.0030.00517.97
8.2.70.0000.00817.75
8.2.60.0000.00817.79
8.2.50.0050.00318.07
8.2.40.0040.00418.28
8.2.30.0000.00819.76
8.2.20.0040.00417.75
8.2.10.0040.00417.79
8.2.00.0060.00317.85
8.1.280.0150.00625.92
8.1.270.0040.00423.99
8.1.260.0040.00426.35
8.1.250.0050.00328.09
8.1.240.0060.00322.03
8.1.230.0040.00719.15
8.1.220.0000.00817.77
8.1.210.0000.00818.77
8.1.200.0090.00317.23
8.1.190.0080.00017.35
8.1.180.0040.00418.10
8.1.170.0060.00318.59
8.1.160.0070.00018.92
8.1.150.0070.00018.67
8.1.140.0040.00417.40
8.1.130.0000.00717.90
8.1.120.0040.00417.48
8.1.110.0000.00717.40
8.1.100.0040.00417.46
8.1.90.0040.00417.49
8.1.80.0050.00317.48
8.1.70.0030.00317.46
8.1.60.0000.00817.63
8.1.50.0000.00817.55
8.1.40.0000.00717.53
8.1.30.0040.00417.70
8.1.20.0080.00017.64
8.1.10.0040.00417.63
8.1.00.0040.00417.57
8.0.300.0070.00018.77
8.0.290.0040.00417.16
8.0.280.0000.00718.48
8.0.270.0000.00717.21
8.0.260.0030.00316.86
8.0.250.0050.00216.90
8.0.240.0030.00516.98
8.0.230.0000.00716.98
8.0.220.0000.00717.00
8.0.210.0030.00316.79
8.0.200.0050.00216.96
8.0.190.0000.00716.96
8.0.180.0070.00017.02
8.0.170.0050.00216.94
8.0.160.0000.00716.89
8.0.150.0000.00816.82
8.0.140.0030.00716.93
8.0.130.0030.00313.38
8.0.120.0000.00816.88
8.0.110.0000.00716.82
8.0.100.0040.00416.83
8.0.90.0000.00717.05
8.0.80.0090.00616.91
8.0.70.0000.00816.81
8.0.60.0040.00416.82
8.0.50.0080.00016.93
8.0.30.0160.00617.04
8.0.20.0040.01517.40
8.0.10.0000.00816.94
8.0.00.0030.01516.67
7.4.330.0030.00314.67
7.4.320.0060.00016.65
7.4.300.0000.00616.52
7.4.290.0030.00316.63
7.4.280.0030.00316.62
7.4.270.0040.00416.56
7.4.260.0000.00513.31
7.4.250.0040.00416.58
7.4.240.0030.00316.54
7.4.230.0000.00716.66
7.4.220.0090.00916.52
7.4.210.0110.00816.64
7.4.200.0030.00316.55
7.4.190.0080.00016.59
7.4.160.0090.00616.49
7.4.150.0130.00417.40
7.4.140.0160.00317.86
7.4.130.0100.00716.40
7.4.120.0080.01216.49
7.4.110.0140.01116.29
7.4.100.0130.00316.69
7.4.90.0100.00716.45
7.4.80.0120.01219.37
7.4.70.0100.00716.46
7.4.60.0050.01116.49
7.4.50.0030.00316.40
7.4.40.0040.01222.52
7.4.30.0140.00716.77
7.4.00.0060.01214.86
7.3.330.0050.00013.10
7.3.320.0000.00513.21
7.3.310.0030.00316.23
7.3.300.0000.00616.26
7.3.290.0060.00916.29
7.3.280.0120.00416.24
7.3.270.0100.00717.40
7.3.260.0090.00918.24
7.3.250.0070.01016.30
7.3.240.0110.00616.33
7.3.230.0080.00816.62
7.3.210.0030.01516.50
7.3.200.0090.01519.39
7.3.190.0060.01116.49
7.3.180.0040.01416.38
7.3.170.0030.01416.54
7.3.160.0060.00916.61
7.3.120.0080.00814.83
7.2.330.0070.01016.68
7.2.320.0150.00716.77
7.2.310.0100.01016.34
7.2.300.0060.00916.65
7.2.290.0100.00716.62
7.2.60.0070.00716.46
7.2.00.0030.01319.45
7.1.200.0030.00615.55
7.1.100.0060.00617.85
7.1.70.0000.00717.09
7.1.60.0100.01319.40
7.1.50.0230.00616.84
7.1.00.0100.07022.29
7.0.200.0110.01514.43
7.0.140.0000.07721.95
7.0.90.0130.08019.95
7.0.80.0030.05719.91
7.0.70.0130.07020.03
7.0.60.0070.08719.82
7.0.50.0070.06320.28
7.0.40.0070.04720.19
7.0.30.0170.08020.12
7.0.20.0170.06720.05
7.0.10.0170.05720.04
7.0.00.0170.05320.11
5.6.280.0030.07321.13
5.6.240.0000.09020.77
5.6.230.0030.07720.49
5.6.220.0030.07720.57
5.6.210.0070.07720.58
5.6.200.0070.09321.05
5.6.190.0030.08321.20
5.6.180.0100.06721.08
5.6.170.0170.07721.12
5.6.160.0100.07021.11
5.6.150.0100.07720.98
5.6.140.0100.07021.16
5.6.130.0000.09720.95
5.6.120.0100.07721.05
5.6.110.0070.07721.18
5.6.100.0100.08721.02
5.6.90.0070.08721.04
5.6.80.0070.08320.44
5.6.70.0100.08320.43
5.6.60.0130.04320.52
5.6.50.0000.08320.48
5.6.40.0030.06020.32
5.6.30.0100.07720.48
5.6.20.0200.06020.30
5.6.10.0130.05320.38
5.6.00.0130.07320.37
5.5.380.0070.08320.44
5.5.370.0130.07320.56
5.5.360.0030.04720.47
5.5.350.0100.04320.34
5.5.340.0070.05020.78
5.5.330.0030.06720.82
5.5.320.0000.07720.84
5.5.310.0170.08020.84
5.5.300.0100.07320.82
5.5.290.0000.04020.74
5.5.280.0070.05020.79
5.5.270.0100.07720.89
5.5.260.0070.06320.91
5.5.250.0170.07320.67
5.5.240.0100.07320.29
5.5.230.0070.04720.04
5.5.220.0100.07720.30
5.5.210.0170.07720.32
5.5.200.0130.07320.23
5.5.190.0070.06720.25
5.5.180.0070.08720.29
5.5.160.0030.08320.10
5.5.150.0070.08320.28
5.5.140.0030.09020.00
5.5.130.0130.07720.12
5.5.120.0170.03720.27
5.5.110.0070.07020.24
5.5.100.0130.07020.09
5.5.90.0130.07719.99
5.5.80.0130.04320.08
5.5.70.0070.03719.95
5.5.60.0070.03720.06
5.5.50.0000.04320.11
5.5.40.0000.04320.10
5.5.30.0100.04020.07
5.5.20.0030.04020.16
5.5.10.0130.03020.05
5.5.00.0000.04320.10
5.4.450.0030.07319.20
5.4.440.0030.04319.45
5.4.430.0070.08019.48
5.4.420.0230.05019.20
5.4.410.0130.06719.07
5.4.400.0070.07719.09
5.4.390.0030.08319.18
5.4.380.0100.07318.95
5.4.370.0130.07318.95
5.4.360.0100.07319.03
5.4.350.0030.07019.04
5.4.340.0130.06018.85
5.4.320.0100.07018.91
5.4.310.0030.06318.90
5.4.300.0170.06319.16
5.4.290.0030.08319.18
5.4.280.0000.06319.23
5.4.270.0030.07719.12
5.4.260.0030.04719.18
5.4.250.0070.04019.04
5.4.240.0030.04018.87
5.4.230.0070.05019.22
5.4.220.0030.04719.08
5.4.210.0030.04319.18
5.4.200.0070.04019.08
5.4.190.0030.04719.11
5.4.180.0030.03719.14
5.4.170.0100.03319.04
5.4.160.0030.03719.19
5.4.150.0030.05019.10
5.4.140.0070.04716.20
5.4.130.0030.03316.46
5.4.120.0000.03716.21
5.4.110.0070.03316.48
5.4.100.0030.03316.57
5.4.90.0070.07016.32
5.4.80.0030.03016.43
5.4.70.0170.02316.36
5.4.60.0000.04016.34
5.4.50.0000.03716.40
5.4.40.0070.03716.45
5.4.30.0070.04016.43
5.4.20.0070.05016.33
5.4.10.0100.02716.43
5.4.00.0070.03715.82
5.3.290.0070.08014.84
5.3.280.0100.03314.68
5.3.270.0070.03714.56
5.3.260.0100.03014.66
5.3.250.0100.04314.60
5.3.240.0000.04314.74
5.3.230.0070.04714.55
5.3.220.0030.03314.55
5.3.210.0030.04014.55
5.3.200.0100.06314.65
5.3.190.0070.04014.57
5.3.180.0000.04014.52
5.3.170.0070.03314.68
5.3.160.0070.03014.62
5.3.150.0030.03714.56
5.3.140.0000.04314.64
5.3.130.0030.03314.51
5.3.120.0030.03714.51
5.3.110.0070.03714.58
5.3.100.0000.04313.99
5.3.90.0030.05313.93
5.3.80.0030.04014.11
5.3.70.0000.04713.94
5.3.60.0070.03314.08
5.3.50.0030.03714.07
5.3.40.0100.02313.90
5.3.30.0030.03714.00
5.3.20.0100.04013.74
5.3.10.0030.03313.61
5.3.00.0030.04313.67
5.2.170.0000.03011.10
5.2.160.0030.03011.23
5.2.150.0000.02711.10
5.2.140.0070.02711.20
5.2.130.0000.03011.24
5.2.120.0100.02311.02
5.2.110.0000.02711.06
5.2.100.0000.03011.21
5.2.90.0000.04011.18
5.2.80.0100.02711.24
5.2.70.0030.03311.24
5.2.60.0030.03011.14
5.2.50.0000.03011.15
5.2.40.0000.03011.11
5.2.30.0000.02710.95
5.2.20.0000.03010.99
5.2.10.0000.03010.88
5.2.00.0000.03710.89
5.1.60.0070.05010.02
5.1.50.0070.0509.91
5.1.40.0100.04710.09
5.1.30.0030.06010.49
5.1.20.0100.04010.44
5.1.10.0070.0539.96
5.1.00.0000.05310.15
5.0.50.0100.0408.66
5.0.40.0100.0408.58
5.0.30.0030.0438.36
5.0.20.0030.0338.30
5.0.10.0070.0408.33
5.0.00.0070.0538.22
4.4.90.0000.0177.14
4.4.80.0030.0137.14
4.4.70.0030.0137.14
4.4.60.0000.0177.14
4.4.50.0000.0177.14
4.4.40.0030.0537.14
4.4.30.0000.0377.14
4.4.20.0030.0377.14
4.4.10.0070.0307.14
4.4.00.0030.0477.14
4.3.110.0070.0207.14
4.3.100.0000.0177.14
4.3.90.0070.0307.14
4.3.80.0000.0577.14
4.3.70.0030.0337.14
4.3.60.0030.0337.14
4.3.50.0000.0277.14
4.3.40.0030.0507.14
4.3.30.0000.0377.14
4.3.20.0030.0377.14
4.3.10.0070.0307.14
4.3.00.0000.0377.14

preferences:
49.13 ms | 401 KiB | 5 Q