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) { $v = _js_enc_value($v); if ($assoc) { $k = '"'. addcslashes($k, '"\\') . '"'; $data[] = $k . ':' . $v; } else { $data[] = $v; } } if ($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)
8.3.60.0080.00818.18
8.3.50.0110.00922.11
8.3.40.0120.00318.70
8.3.30.0040.01118.66
8.3.20.0050.00318.82
8.3.10.0090.00021.22
8.3.00.0050.00223.66
8.2.180.0180.00416.88
8.2.170.0100.00722.96
8.2.160.0170.00320.43
8.2.150.0030.00624.18
8.2.140.0040.00424.66
8.2.130.0040.00426.16
8.2.120.0060.00319.48
8.2.110.0000.01020.99
8.2.100.0110.00017.84
8.2.90.0040.00419.35
8.2.80.0050.00317.97
8.2.70.0000.00817.75
8.2.60.0000.00818.16
8.2.50.0000.00818.07
8.2.40.0040.00418.22
8.2.30.0030.00619.91
8.2.20.0050.00317.69
8.2.10.0040.00417.86
8.2.00.0070.00017.79
8.1.270.0050.00323.99
8.1.260.0030.00526.35
8.1.250.0040.00428.09
8.1.240.0100.00022.54
8.1.230.0070.00420.88
8.1.220.0030.00518.77
8.1.210.0050.00318.95
8.1.200.0030.00617.23
8.1.190.0000.00817.53
8.1.180.0040.00418.10
8.1.170.0000.00818.65
8.1.160.0070.00018.98
8.1.150.0040.00418.68
8.1.140.0080.00017.44
8.1.130.0070.00017.93
8.1.120.0070.00017.44
8.1.110.0040.00417.50
8.1.100.0030.00617.40
8.1.90.0040.00417.55
8.1.80.0070.00017.52
8.1.70.0030.00317.38
8.1.60.0060.00317.59
8.1.50.0040.00417.42
8.1.40.0030.00617.47
8.1.30.0040.00417.66
8.1.20.0080.00017.59
8.1.10.0000.00817.61
8.1.00.0030.00717.49
8.0.300.0040.00420.23
8.0.290.0040.00416.63
8.0.280.0040.00418.46
8.0.270.0070.00017.29
8.0.260.0000.00716.86
8.0.250.0000.00817.02
8.0.240.0000.00816.98
8.0.230.0000.00716.96
8.0.220.0030.00316.98
8.0.210.0000.00716.89
8.0.200.0000.00717.05
8.0.190.0070.00017.08
8.0.180.0070.00017.01
8.0.170.0040.00416.99
8.0.160.0050.00317.03
8.0.150.0040.00416.89
8.0.140.0070.00017.03
8.0.130.0000.00513.43
8.0.120.0050.00516.96
8.0.110.0000.00716.84
8.0.100.0000.00716.97
8.0.90.0040.00416.89
8.0.80.0130.01016.98
8.0.70.0000.00716.84
8.0.60.0000.00716.96
8.0.50.0030.00617.11
8.0.30.0110.00917.21
8.0.20.0100.00917.40
8.0.10.0050.00216.90
8.0.00.0130.00916.75
7.4.330.0000.00514.69
7.4.320.0050.00516.57
7.4.300.0030.00316.55
7.4.290.0030.00516.66
7.4.280.0000.00716.54
7.4.270.0030.00316.56
7.4.260.0050.00013.26
7.4.250.0000.00816.54
7.4.240.0000.00716.48
7.4.230.0070.00016.62
7.4.220.0130.00316.61
7.4.210.0070.00916.57
7.4.200.0000.00716.68
7.4.190.0030.00516.70
7.4.160.0100.00716.54
7.4.150.0070.01017.40
7.4.140.0120.00717.86
7.4.130.0100.00916.61
7.4.120.0100.00816.62
7.4.110.0070.01016.31
7.4.100.0070.01016.49
7.4.90.0000.01816.46
7.4.80.0070.01019.37
7.4.70.0070.01116.53
7.4.60.0080.01216.45
7.4.50.0030.00616.60
7.4.40.0150.00022.27
7.4.30.0100.01116.45
7.4.00.0030.01314.68
7.3.330.0050.00013.18
7.3.320.0000.00513.36
7.3.310.0000.00716.34
7.3.300.0000.00716.23
7.3.290.0070.00716.32
7.3.280.0120.00516.34
7.3.270.0030.01617.40
7.3.260.0100.01118.24
7.3.250.0110.00816.36
7.3.240.0100.00616.28
7.3.230.0170.00016.50
7.3.210.0090.01816.47
7.3.200.0110.01119.39
7.3.190.0090.00916.36
7.3.180.0060.01216.24
7.3.170.0110.01116.55
7.3.160.0090.01216.56
7.3.120.0090.00315.08
7.3.10.0040.00916.18
7.3.00.0110.00016.19
7.2.330.0000.01816.74
7.2.320.0070.01116.50
7.2.310.0120.00916.43
7.2.300.0120.00616.46
7.2.290.0090.01216.64
7.2.130.0030.00916.41
7.2.120.0110.00316.64
7.2.110.0000.01116.44
7.2.100.0080.00816.58
7.2.90.0150.00616.62
7.2.80.0210.00316.53
7.2.70.0030.01016.87
7.2.60.0120.00916.64
7.2.50.0030.00916.90
7.2.40.0030.01316.82
7.2.30.0060.00616.76
7.2.20.0000.01116.66
7.2.10.0030.01016.50
7.2.00.0070.01017.97
7.1.250.0070.00315.25
7.1.100.0110.00018.07
7.1.70.0000.01116.92
7.1.60.0100.01419.40
7.1.50.0070.01516.84
7.1.00.0030.04722.54
7.0.200.0070.00016.88
7.0.140.0070.07021.95
7.0.90.0070.08020.02
7.0.80.0070.07019.88
7.0.70.0100.04719.93
7.0.60.0030.05320.00
7.0.50.0130.05720.28
7.0.40.0130.05320.09
7.0.30.0070.08320.15
7.0.20.0100.08020.04
7.0.10.0070.07320.09
7.0.00.0100.05720.12
5.6.280.0000.07721.06
5.6.240.0170.06020.66
5.6.230.0200.06320.52
5.6.220.0000.05320.67
5.6.210.0070.08320.67
5.6.200.0170.07321.05
5.6.190.0200.07021.16
5.6.180.0170.07021.07
5.6.170.0170.06720.97
5.6.160.0070.08321.08
5.6.150.0070.08021.12
5.6.140.0070.07320.98
5.6.130.0030.05321.18
5.6.120.0170.07021.09
5.6.110.0130.04721.07
5.6.100.0030.09021.09
5.6.90.0070.07321.08
5.6.80.0130.06720.58
5.6.70.0100.07020.33
5.6.60.0130.06720.52
5.6.50.0100.07720.50
5.6.40.0100.08020.48
5.6.30.0100.04320.42
5.6.20.0170.07320.30
5.6.10.0030.08320.45
5.6.00.0070.06720.43
5.5.380.0030.08020.39
5.5.370.0070.06720.47
5.5.360.0100.04720.55
5.5.350.0100.08020.42
5.5.340.0070.06020.82
5.5.330.0100.07720.81
5.5.320.0300.07020.88
5.5.310.0230.03720.92
5.5.300.0130.04720.86
5.5.290.0100.07720.92
5.5.280.0100.07720.92
5.5.270.0130.05020.89
5.5.260.0070.08320.88
5.5.250.0130.07720.59
5.5.240.0070.06020.23
5.5.230.0070.05720.23
5.5.220.0100.07320.32
5.5.210.0170.06720.30
5.5.200.0130.04720.30
5.5.190.0000.06020.16
5.5.180.0130.07320.16
5.5.160.0070.08020.24
5.5.150.0170.06720.19
5.5.140.0070.08020.12
5.5.130.0000.07720.10
5.5.120.0170.06720.25
5.5.110.0030.05720.28
5.5.100.0030.05320.04
5.5.90.0330.04319.96
5.5.80.0030.08020.08
5.5.70.0030.07320.14
5.5.60.0000.05320.12
5.5.50.0130.03019.97
5.5.40.0100.06019.98
5.5.30.0100.08020.11
5.5.20.0030.07720.16
5.5.10.0130.07720.14
5.5.00.0100.05719.99
5.4.450.0130.07719.26
5.4.440.0130.07719.37
5.4.430.0030.05719.37
5.4.420.0100.07019.37
5.4.410.0130.07019.24
5.4.400.0170.06318.91
5.4.390.0100.04719.14
5.4.380.0030.08318.95
5.4.370.0070.07018.88
5.4.360.0100.04319.14
5.4.350.0070.07319.11
5.4.340.0100.05318.96
5.4.320.0000.06319.14
5.4.310.0030.05018.95
5.4.300.0030.08018.87
5.4.290.0170.07018.94
5.4.280.0070.05019.03
5.4.270.0100.07718.84
5.4.260.0070.04019.09
5.4.250.0100.07018.87
5.4.240.0130.07019.02
5.4.230.0170.06718.85
5.4.220.0000.07719.15
5.4.210.0030.03719.22
5.4.200.0130.07319.20
5.4.190.0100.07019.08
5.4.180.0070.07718.89
5.4.170.0130.07319.13
5.4.160.0100.07319.16
5.4.150.0100.05319.11
5.4.140.0030.07716.44
5.4.130.0070.07016.46
5.4.120.0070.06716.25
5.4.110.0130.04716.40
5.4.100.0100.06016.47
5.4.90.0030.07316.47
5.4.80.0030.04716.50
5.4.70.0070.04316.46
5.4.60.0230.05716.31
5.4.50.0000.07716.50
5.4.40.0130.06316.37
5.4.30.0030.07716.36
5.4.20.0030.04316.30
5.4.10.0000.06016.36
5.4.00.0070.07015.73
5.3.290.0070.07314.75
5.3.280.0030.07714.55
5.3.270.0070.04714.63
5.3.260.0170.06714.66
5.3.250.0070.06714.69
5.3.240.0070.07314.70
5.3.230.0100.04714.72
5.3.220.0100.06014.52
5.3.210.0170.04714.57
5.3.200.0100.07314.70
5.3.190.0130.07014.73
5.3.180.0130.06314.58
5.3.170.0130.06714.57
5.3.160.0100.07314.65
5.3.150.0030.04314.65
5.3.140.0100.07314.64
5.3.130.0070.07714.55
5.3.120.0130.04314.57
5.3.110.0030.08314.64
5.3.100.0030.05014.13
5.3.90.0070.07714.14
5.3.80.0000.06314.14
5.3.70.0070.07314.05
5.3.60.0070.08014.06
5.3.50.0030.07313.90
5.3.40.0100.07013.88
5.3.30.0070.07313.84
5.3.20.0170.06013.79
5.3.10.0030.06713.69
5.3.00.0130.05013.67
5.2.170.0030.06311.12
5.2.160.0100.04011.06
5.2.150.0100.05311.31
5.2.140.0070.05011.28
5.2.130.0130.05311.05
5.2.120.0070.06311.24
5.2.110.0100.06011.03
5.2.100.0070.04311.16
5.2.90.0130.05011.28
5.2.80.0100.05711.26
5.2.70.0030.06311.13
5.2.60.0070.05011.22
5.2.50.0070.05710.91
5.2.40.0000.06311.04
5.2.30.0030.06310.98
5.2.20.0000.06311.07
5.2.10.0030.05010.94
5.2.00.0070.05710.88
5.1.60.0030.03010.03
5.1.50.0030.05710.13
5.1.40.0030.05310.00
5.1.30.0130.04710.41
5.1.20.0000.06010.25
5.1.10.0000.05710.21
5.1.00.0030.06010.11
5.0.50.0030.0478.69
5.0.40.0000.0478.45
5.0.30.0000.0578.27
5.0.20.0070.0408.32
5.0.10.0070.0438.07
5.0.00.0100.0438.22
4.4.90.0030.0337.53
4.4.80.0000.0207.53
4.4.70.0000.0207.53
4.4.60.0030.0277.53
4.4.50.0000.0377.53
4.4.40.0070.0307.53
4.4.30.0030.0277.53
4.4.20.0000.0407.53
4.4.10.0000.0377.53
4.4.00.0030.0507.53
4.3.110.0070.0337.53
4.3.100.0000.0377.53
4.3.90.0000.0337.53
4.3.80.0070.0207.53
4.3.70.0000.0277.53
4.3.60.0000.0177.53
4.3.50.0030.0137.53
4.3.40.0070.0477.53
4.3.30.0000.0377.53
4.3.20.0000.0307.53
4.3.10.0070.0307.53
4.3.00.0000.0277.53

preferences:
35.42 ms | 400 KiB | 5 Q