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'; } } } $var = array( 0 => array('text', 1, 1.1, true, false, null, array(), new stdClass, fopen('php://stdout', 'r')), 2 => array('a' => 'hoge', 'b' => 'foo'), ); echo @json_encode($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)
8.3.60.0130.00716.63
8.3.50.0080.00822.01
8.3.40.0070.00718.82
8.3.30.0070.00719.19
8.3.20.0040.00420.34
8.3.10.0000.00823.66
8.3.00.0080.00019.38
8.2.180.0080.01516.38
8.2.170.0140.00722.96
8.2.160.0070.00720.39
8.2.150.0040.00424.18
8.2.140.0040.00424.66
8.2.130.0040.00426.16
8.2.120.0000.00822.25
8.2.110.0100.00020.52
8.2.100.0080.00419.70
8.2.90.0040.00419.36
8.2.80.0000.00817.97
8.2.70.0000.01017.50
8.2.60.0040.00417.93
8.2.50.0100.00018.07
8.2.40.0060.00320.07
8.2.30.0000.00718.18
8.2.20.0000.00917.79
8.2.10.0040.00418.16
8.2.00.0040.00717.88
8.1.280.0130.00325.92
8.1.270.0040.00423.84
8.1.260.0040.00426.35
8.1.250.0040.00428.09
8.1.240.0120.00623.98
8.1.230.0030.00717.51
8.1.220.0080.00017.79
8.1.210.0030.00518.77
8.1.200.0030.00617.22
8.1.190.0050.00517.25
8.1.180.0030.00718.10
8.1.170.0080.00018.41
8.1.160.0000.00722.06
8.1.150.0050.00318.61
8.1.140.0080.00017.50
8.1.130.0000.00717.73
8.1.120.0000.00717.54
8.1.110.0000.00817.51
8.1.100.0070.00017.42
8.1.90.0040.00417.56
8.1.80.0000.00717.52
8.1.70.0000.00717.40
8.1.60.0000.00717.65
8.1.50.0000.00717.55
8.1.40.0040.00417.57
8.1.30.0040.00417.65
8.1.20.0060.00317.71
8.1.10.0040.00417.52
8.1.00.0030.00517.57
8.0.300.0060.00318.77
8.0.290.0040.00416.88
8.0.280.0000.00718.57
8.0.270.0030.00317.29
8.0.260.0030.00317.38
8.0.250.0040.00417.09
8.0.240.0030.00716.98
8.0.230.0050.00317.06
8.0.220.0000.00817.01
8.0.210.0000.00717.03
8.0.200.0030.00317.07
8.0.190.0040.00416.96
8.0.180.0040.00417.02
8.0.170.0030.00616.98
8.0.160.0000.00716.92
8.0.150.0040.00416.86
8.0.140.0000.01016.97
8.0.130.0030.00313.50
8.0.120.0040.00417.02
8.0.110.0000.00716.99
8.0.100.0040.00417.01
8.0.90.0040.00416.83
8.0.80.0090.01217.02
8.0.70.0000.00717.08
8.0.60.0040.00416.80
8.0.50.0000.00816.84
8.0.30.0110.00817.17
8.0.20.0090.01017.41
8.0.10.0040.00416.93
8.0.00.0100.00816.77
7.4.330.0000.00515.00
7.4.320.0040.00416.55
7.4.300.0000.00616.55
7.4.290.0040.00416.56
7.4.280.0000.00716.56
7.4.270.0030.00316.66
7.4.260.0000.00816.43
7.4.250.0050.00316.52
7.4.240.0040.00316.57
7.4.230.0040.00416.73
7.4.220.0090.00916.59
7.4.210.0110.00616.57
7.4.200.0000.00716.46
7.4.190.0000.00716.82
7.4.160.0160.00316.69
7.4.150.0070.01117.40
7.4.140.0080.00917.86
7.4.130.0100.00816.65
7.4.120.0060.01116.68
7.4.110.0120.00616.77
7.4.100.0070.00416.65
7.4.90.0130.00716.66
7.4.80.0110.00819.39
7.4.70.0070.01016.45
7.4.60.0100.00916.40
7.4.50.0060.00316.57
7.4.40.0080.00816.46
7.4.30.0130.00316.64
7.4.00.0120.00015.01
7.3.330.0040.00413.37
7.3.320.0000.00613.29
7.3.310.0000.00716.25
7.3.300.0050.00216.36
7.3.290.0100.00416.35
7.3.280.0100.00816.32
7.3.270.0160.00017.40
7.3.260.0040.01616.52
7.3.250.0090.00916.40
7.3.240.0070.01016.34
7.3.230.0110.01116.39
7.3.210.0090.00816.32
7.3.200.0060.01119.39
7.3.190.0140.00416.50
7.3.180.0070.01416.28
7.3.170.0140.00716.48
7.3.160.0090.00616.42
7.3.120.0070.01014.45
7.2.330.0030.01416.71
7.2.320.0070.01116.48
7.2.310.0060.01016.70
7.2.300.0070.01016.41
7.2.290.0080.00816.61
7.2.00.0060.00919.65
7.1.100.0060.00318.08
7.1.70.0000.01017.22
7.1.60.0180.00719.46
7.1.50.0100.01316.98
7.1.00.0030.07022.43
7.0.200.0070.00016.41
7.0.140.0000.07722.10
7.0.90.0400.09319.98
7.0.80.0670.06319.96
7.0.70.0500.05719.90
7.0.60.0500.06320.06
7.0.50.0570.08020.34
7.0.40.0100.07720.12
7.0.30.0030.07320.01
7.0.20.0070.08720.04
7.0.10.0100.05720.12
7.0.00.0000.05020.11
5.6.280.0030.07320.84
5.6.240.0100.05320.55
5.6.230.0130.07320.68
5.6.220.0170.07320.46
5.6.210.0000.09020.63
5.6.200.0030.04321.10
5.6.190.0000.09021.02
5.6.180.0130.05021.09
5.6.170.0070.08321.19
5.6.160.0070.04020.98
5.6.150.0130.07021.07
5.6.140.0030.09321.06
5.6.130.0070.07721.12
5.6.120.0000.09320.96
5.6.110.0030.09021.01
5.6.100.0170.07321.18
5.6.90.0170.07321.17
5.6.80.0030.07320.49
5.6.70.0070.08320.43
5.6.60.0130.07320.55
5.6.50.0030.08020.34
5.6.40.0070.08020.33
5.6.30.0170.07020.31
5.6.20.0030.08020.40
5.6.10.0070.06720.45
5.6.00.0000.05320.37
5.5.380.0130.07020.45
5.5.370.0130.07720.46
5.5.360.0030.05020.40
5.5.350.0130.08020.33
5.5.340.0100.04020.75
5.5.330.0030.09020.88
5.5.320.0000.05020.75
5.5.310.0100.05720.94
5.5.300.0100.08320.89
5.5.290.0170.07720.91
5.5.280.0030.05320.93
5.5.270.0130.07720.72
5.5.260.0100.05020.88
5.5.250.0100.05320.70
5.5.240.0070.08320.19
5.5.230.0100.08020.20
5.5.220.0030.08320.30
5.5.210.0100.08020.27
5.5.200.0070.06720.29
5.5.190.0030.05320.25
5.5.180.0070.07020.17
5.5.160.0070.07020.27
5.5.150.0030.07320.16
5.5.140.0030.06320.25
5.5.130.0070.05020.23
5.5.120.0070.04720.01
5.5.110.0130.06720.11
5.5.100.0070.07720.21
5.5.90.0100.07719.95
5.5.80.0070.05020.11
5.5.70.0030.08020.16
5.5.60.0170.07320.18
5.5.50.0030.08320.07
5.5.40.0130.07320.07
5.5.30.0070.08020.05
5.5.20.0100.04020.04
5.5.10.0070.07720.07
5.5.00.0100.07320.09
5.4.450.0070.04019.28
5.4.440.0130.07019.47
5.4.430.0130.07719.34
5.4.420.0070.07319.37
5.4.410.0070.08319.24
5.4.400.0100.07719.14
5.4.390.0130.07319.23
5.4.380.0070.05019.23
5.4.370.0100.05019.04
5.4.360.0070.07318.85
5.4.350.0030.07719.04
5.4.340.0100.07019.21
5.4.320.0030.07719.13
5.4.310.0070.07719.24
5.4.300.0100.04719.13
5.4.290.0100.03318.84
5.4.280.0130.07019.10
5.4.270.0000.05719.14
5.4.260.0100.06719.12
5.4.250.0070.05018.84
5.4.240.0070.04319.04
5.4.230.0100.05019.04
5.4.220.0070.07318.94
5.4.210.0100.07318.88
5.4.200.0000.08019.14
5.4.190.0070.04719.04
5.4.180.0100.04318.86
5.4.170.0070.08318.91
5.4.160.0000.05319.03
5.4.150.0070.08018.93
5.4.140.0100.04316.42
5.4.130.0000.06016.41
5.4.120.0030.05716.50
5.4.110.0130.04316.33
5.4.100.0130.03016.52
5.4.90.0030.04316.49
5.4.80.0070.07716.54
5.4.70.0070.07016.49
5.4.60.0000.04716.33
5.4.50.0070.04316.46
5.4.40.0030.07016.30
5.4.30.0170.06316.42
5.4.20.0030.06316.48
5.4.10.0030.06316.54
5.4.00.0100.04715.85
5.3.290.0100.05014.83
5.3.280.0070.08314.76
5.3.270.0000.07014.68
5.3.260.0100.05014.73
5.3.250.0170.06714.72
5.3.240.0170.06014.66
5.3.230.0070.08014.69
5.3.220.0030.04014.70
5.3.210.0070.08014.69
5.3.200.0100.06314.71
5.3.190.0000.04014.65
5.3.180.0100.03314.65
5.3.170.0130.04314.58
5.3.160.0070.07714.53
5.3.150.0030.08014.62
5.3.140.0170.06014.51
5.3.130.0130.05714.68
5.3.120.0100.06314.69
5.3.110.0030.07314.50
5.3.100.0070.07314.18
5.3.90.0070.07314.03
5.3.80.0030.07314.13
5.3.70.0000.07714.07
5.3.60.0130.06714.00
5.3.50.0030.07713.90
5.3.40.0070.05314.11
5.3.30.0170.04713.96
5.3.20.0170.06713.71
5.3.10.0100.07013.71
5.3.00.0030.06013.59
5.2.170.0100.06011.03
5.2.160.0000.06311.04
5.2.150.0030.06311.26
5.2.140.0030.03011.10
5.2.130.0130.05311.18
5.2.120.0100.05311.12
5.2.110.0070.06311.14
5.2.100.0130.05311.12
5.2.90.0100.05711.14
5.2.80.0030.04711.26
5.2.70.0130.05311.05
5.2.60.0030.06011.15
5.2.50.0030.05310.97
5.2.40.0070.06311.15
5.2.30.0030.06011.01
5.2.20.0130.05311.04
5.2.10.0070.02710.94
5.2.00.0170.04710.89
5.1.60.0070.05010.02
5.1.50.0100.04710.02
5.1.40.0030.05010.11
5.1.30.0070.02710.29
5.1.20.0070.02310.27
5.1.10.0200.0379.95
5.1.00.0070.05710.09
5.0.50.0070.0438.72
5.0.40.0070.0378.55
5.0.30.0000.0408.17
5.0.20.0100.0278.25
5.0.10.0000.0438.21
5.0.00.0070.0608.21
4.4.90.0100.0277.79
4.4.80.0000.0237.79
4.4.70.0070.0237.79
4.4.60.0000.0207.79
4.4.50.0030.0207.79
4.4.40.0070.0477.79
4.4.30.0070.0307.79
4.4.20.0030.0177.79
4.4.10.0000.0277.79
4.4.00.0030.0277.79
4.3.110.0070.0137.79
4.3.100.0000.0407.79
4.3.90.0000.0307.79
4.3.80.0070.0477.79
4.3.70.0000.0337.79
4.3.60.0030.0337.79
4.3.50.0030.0377.79
4.3.40.0030.0507.79
4.3.30.0030.0337.79
4.3.20.0000.0277.79
4.3.10.0030.0307.79
4.3.00.0070.0237.79

preferences:
46.78 ms | 400 KiB | 5 Q