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) { $k = _js_enc_value((string)$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 $value === null: case is_resource($value): return 'null'; case is_bool($value): return $value ? 'true' : 'false'; case is_string($value): return '"' . _js_uc_esc($value) . '"'; default: return $value; } } function _js_uc_esc($value) { $pattern = "@[\x08-\x10\x0c\x0d\\\\\"/]|([^\x08-\x10\x0c\x0d\x32-\x7f\\\\\"/])++@u"; return preg_replace_callback($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\\\"/"); } } } $var = array( array( 'text', 1, 1.1, true, false, null, array(), new stdClass, ), array( '&\'/"' => "\r\n\t", ), array( '0' => 'hoge', '1' => 'foo', ), (object)array( '0' => 'hoge', '1' => 'foo', ), array( '0' => 'hoge', '2' => 'foo', ), (object)array( '0' => 'hoge', '2' => 'foo', ), ); var_dump(@json_encode($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)
8.3.40.0120.00818.67
8.3.30.0000.01518.84
8.3.20.0090.00018.90
8.3.10.0030.00518.90
8.3.00.0030.00619.50
8.2.170.0250.00422.96
8.2.160.0120.00419.06
8.2.150.0040.00424.18
8.2.140.0040.00424.66
8.2.130.0040.00426.16
8.2.120.0040.00420.79
8.2.110.0090.00020.54
8.2.100.0060.00617.83
8.2.90.0050.00317.75
8.2.80.0050.00318.87
8.2.70.0040.00417.63
8.2.60.0040.00417.63
8.2.50.0000.00817.88
8.2.40.0040.00419.48
8.2.30.0030.00717.81
8.2.20.0030.00717.73
8.2.10.0030.00617.80
8.2.00.0060.00617.92
8.1.270.0040.00423.99
8.1.260.0040.00426.35
8.1.250.0150.00428.09
8.1.240.0080.00421.90
8.1.230.0060.00622.68
8.1.220.0030.00618.58
8.1.210.0050.00518.77
8.1.200.0030.00517.35
8.1.190.0080.00317.22
8.1.180.0060.00318.10
8.1.170.0040.00417.62
8.1.160.0070.00019.08
8.1.150.0060.00318.61
8.1.140.0000.00817.42
8.1.130.0040.00417.44
8.1.120.0050.00217.57
8.1.110.0080.00017.50
8.1.100.0000.00717.48
8.1.90.0000.00717.55
8.1.80.0040.00417.52
8.1.70.0050.00217.48
8.1.60.0080.00017.67
8.1.50.0050.00217.54
8.1.40.0040.00417.56
8.1.30.0040.00417.62
8.1.20.0000.00817.54
8.1.10.0060.00317.66
8.1.00.0030.00517.45
8.0.300.0060.00318.77
8.0.290.0040.00416.75
8.0.280.0070.00018.66
8.0.270.0000.00817.21
8.0.260.0070.00016.90
8.0.250.0040.00417.07
8.0.240.0000.00917.05
8.0.230.0000.00717.03
8.0.220.0070.00017.05
8.0.210.0050.00317.03
8.0.200.0000.00716.96
8.0.190.0040.00417.14
8.0.180.0070.00316.92
8.0.170.0000.01017.02
8.0.160.0040.00416.97
8.0.150.0040.00416.91
8.0.140.0080.00316.96
8.0.130.0030.00313.37
8.0.120.0040.00416.93
8.0.110.0050.00217.04
8.0.100.0040.00416.89
8.0.90.0050.00316.89
8.0.80.0130.01017.06
8.0.70.0040.00417.13
8.0.60.0060.00317.06
8.0.50.0080.00016.87
8.0.30.0100.00717.20
8.0.20.0090.00917.31
8.0.10.0000.00817.24
8.0.00.0150.00716.91
7.4.330.0020.00213.16
7.4.320.0030.00316.67
7.4.300.0020.00516.45
7.4.290.0030.00316.59
7.4.280.0040.00416.54
7.4.270.0070.00016.57
7.4.260.0000.00513.34
7.4.250.0040.00416.54
7.4.240.0040.00416.67
7.4.230.0050.00516.48
7.4.220.0180.00016.52
7.4.210.0030.01216.77
7.4.200.0050.00316.74
7.4.190.0000.00816.43
7.4.160.0050.01116.55
7.4.150.0070.01116.61
7.4.140.0120.00916.43
7.4.130.0000.01716.51
7.4.120.0130.00316.61
7.4.110.0100.01016.65
7.4.100.0080.00916.64
7.4.90.0130.00616.39
7.4.80.0070.01119.39
7.4.70.0100.00716.66
7.4.60.0040.01416.59
7.4.50.0000.00916.50
7.4.40.0090.00616.58
7.4.30.0060.01416.77
7.4.00.0070.01015.30
7.3.330.0030.00313.13
7.3.320.0050.00013.30
7.3.310.0070.00016.17
7.3.300.0040.00416.39
7.3.290.0080.00716.35
7.3.280.0070.00716.28
7.3.270.0080.00816.29
7.3.260.0150.00316.30
7.3.250.0120.00616.27
7.3.240.0000.01716.31
7.3.230.0070.01016.34
7.3.210.0070.01016.32
7.3.200.0100.00716.59
7.3.190.0080.01516.41
7.3.180.0070.01616.66
7.3.170.0110.00516.30
7.3.160.0060.01216.43
7.3.120.0090.00614.70
7.2.330.0060.01216.47
7.2.320.0090.00916.46
7.2.310.0030.01516.55
7.2.300.0120.00916.59
7.2.290.0050.01316.52
7.2.00.0060.00619.29
7.1.100.0160.01017.87
7.1.70.0000.01217.12
7.1.60.0090.01619.30
7.1.50.0120.01216.96
7.1.00.0000.03722.36
7.0.200.0000.00816.57
7.0.140.0170.06322.01
7.0.120.0030.07322.06
7.0.90.0430.07019.98
7.0.80.0300.08019.96
7.0.70.0100.08719.91
7.0.60.0400.04320.01
7.0.50.0170.06720.26
7.0.40.0030.09020.07
7.0.30.0030.07720.14
7.0.20.0100.04020.14
7.0.10.0200.06320.11
7.0.00.0100.04319.99
5.6.280.0070.07020.91
5.6.240.0070.08720.65
5.6.230.0200.04020.70
5.6.220.0000.06020.51
5.6.210.0130.05720.77
5.6.200.0100.07720.97
5.6.190.0070.04321.15
5.6.180.0100.04020.97
5.6.170.0100.08021.16
5.6.160.0070.05021.03
5.6.150.0100.03721.08
5.6.140.0070.08020.95
5.6.130.0030.09021.18
5.6.120.0130.07321.10
5.6.110.0030.05021.01
5.6.100.0070.09721.05
5.6.90.0130.07021.02
5.6.80.0170.06720.46
5.6.70.0070.07020.43
5.6.60.0030.05320.40
5.6.50.0070.04020.54
5.6.40.0170.07720.41
5.6.30.0000.08020.47
5.6.20.0200.06320.38
5.6.10.0000.06320.41
5.6.00.0030.08320.38
5.5.380.0030.08320.38
5.5.370.0130.07020.43
5.5.360.0170.05320.39
5.5.350.0100.08720.39
5.5.340.0170.04320.88
5.5.330.0070.04020.88
5.5.320.0070.07020.81
5.5.310.0130.06020.85
5.5.300.0130.03720.66
5.5.290.0070.08020.62
5.5.280.0070.05020.88
5.5.270.0030.09020.89
5.5.260.0170.07320.74
5.5.250.0170.03320.71
5.5.240.0130.07720.26
5.5.230.0130.07020.27
5.5.220.0130.04020.25
5.5.210.0100.03720.27
5.5.200.0030.07720.20
5.5.190.0070.07720.27
5.5.180.0070.08320.23
5.5.160.0100.04320.26
5.5.150.0070.05020.01
5.5.140.0000.05720.20
5.5.130.0070.07720.24
5.5.120.0100.04020.25
5.5.110.0130.06320.22
5.5.100.0000.05320.17
5.5.90.0000.04320.17
5.5.80.0030.04020.09
5.5.70.0130.06720.02
5.5.60.0070.04320.10
5.5.50.0100.04020.06
5.5.40.0100.03320.07
5.5.30.0000.04319.97
5.5.20.0100.03020.06
5.5.10.0100.03319.99
5.5.00.0030.04720.05
5.4.450.0030.04319.54
5.4.440.0030.06719.21
5.4.430.0030.07319.55
5.4.420.0070.08019.35
5.4.410.0130.06719.24
5.4.400.0070.04319.17
5.4.390.0030.08319.14
5.4.380.0030.08018.91
5.4.370.0070.06719.16
5.4.360.0070.05719.11
5.4.350.0100.07018.88
5.4.340.0030.06319.21
5.4.320.0100.06719.14
5.4.310.0030.08018.88
5.4.300.0030.04019.04
5.4.290.0100.06719.12
5.4.280.0030.07719.03
5.4.270.0070.05319.12
5.4.260.0100.05319.04
5.4.250.0030.05319.08
5.4.240.0100.05719.11
5.4.230.0070.03719.17
5.4.220.0000.04719.20
5.4.210.0030.03719.12
5.4.200.0030.04718.93
5.4.190.0070.03719.03
5.4.180.0100.03019.22
5.4.170.0030.04019.17
5.4.160.0070.03319.16
5.4.150.0100.02319.00
5.4.140.0070.03716.51
5.4.130.0030.03016.46
5.4.120.0070.04016.49
5.4.110.0030.03316.44
5.4.100.0100.03016.38
5.4.90.0030.03016.38
5.4.80.0030.03316.55
5.4.70.0000.04316.46
5.4.60.0000.03016.30
5.4.50.0070.03716.48
5.4.40.0030.04316.53
5.4.30.0000.03316.36
5.4.20.0030.03316.33
5.4.10.0070.06716.42
5.4.00.0030.03315.81
5.3.290.0130.07714.71
5.3.280.0030.04014.54
5.3.270.0000.04014.70
5.3.260.0070.03314.59
5.3.250.0070.02714.75
5.3.240.0000.04014.62
5.3.230.0000.04014.61
5.3.220.0070.04014.63
5.3.210.0000.04014.72
5.3.200.0070.03314.64
5.3.190.0070.03714.55
5.3.180.0000.04014.58
5.3.170.0030.03314.52
5.3.160.0070.04714.68
5.3.150.0000.03314.60
5.3.140.0030.03714.61
5.3.130.0070.03314.61
5.3.120.0030.03714.54
5.3.110.0100.04314.59
5.3.100.0070.03014.13
5.3.90.0100.02714.07
5.3.80.0070.03314.02
5.3.70.0030.05314.10
5.3.60.0070.06714.09
5.3.50.0030.03714.11
5.3.40.0000.04313.88
5.3.30.0030.03714.05
5.3.20.0070.05313.77
5.3.10.0030.03313.68
5.3.00.0100.03013.72
5.2.170.0030.02711.24
5.2.160.0070.02711.05
5.2.150.0000.03011.13
5.2.140.0100.04711.30
5.2.130.0000.03311.06
5.2.120.0030.03311.27
5.2.110.0000.03011.23
5.2.100.0070.03711.06
5.2.90.0000.03311.04
5.2.80.0000.03011.07
5.2.70.0030.03011.01
5.2.60.0000.03011.11
5.2.50.0000.04011.06
5.2.40.0030.02711.02
5.2.30.0030.03311.03
5.2.20.0000.03311.04
5.2.10.0000.03310.94
5.2.00.0030.02710.78
5.1.60.0030.02310.06
5.1.50.0030.02310.07
5.1.40.0000.0309.86
5.1.30.0000.03010.50
5.1.20.0130.05010.46
5.1.10.0000.0509.95
5.1.00.0030.05710.11
5.0.50.0070.0438.49
5.0.40.0000.0508.35
5.0.30.0030.0508.18
5.0.20.0030.0438.34
5.0.10.0070.0408.09
5.0.00.0030.0578.32
4.4.90.0000.0177.45
4.4.80.0030.0277.45
4.4.70.0000.0177.45
4.4.60.0070.0107.45
4.4.50.0000.0207.45
4.4.40.0000.0237.45
4.4.30.0030.0137.45
4.4.20.0030.0337.45
4.4.10.0000.0337.45
4.4.00.0030.0477.45
4.3.110.0000.0377.45
4.3.100.0030.0277.45
4.3.90.0000.0207.45
4.3.80.0130.0537.45
4.3.70.0000.0377.45
4.3.60.0000.0307.45
4.3.50.0030.0277.45
4.3.40.0000.0377.45
4.3.30.0000.0277.45
4.3.20.0000.0377.45
4.3.10.0000.0407.45
4.3.00.0000.0337.45

preferences:
50.39 ms | 400 KiB | 5 Q