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($value): return '"' . _js_uc_esc($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'; } } } $var = array( 0 => array('text', 1, 1.1, true, false, null, new stdClass), 2 => array('a' => 'hoge', 'b' => 'foo'), ); echo json_encode($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)
8.3.60.0120.00618.56
8.3.50.0130.00421.27
8.3.40.0090.00618.70
8.3.30.0070.00720.29
8.3.20.0040.00420.40
8.3.10.0080.00021.22
8.3.00.0040.00423.65
8.2.180.0070.00717.00
8.2.170.0120.00922.96
8.2.160.0110.00420.35
8.2.150.0050.00324.18
8.2.140.0040.00424.66
8.2.130.0040.00426.16
8.2.120.0050.00321.00
8.2.110.0030.00720.97
8.2.100.0060.00617.91
8.2.90.0060.00317.88
8.2.80.0090.00018.04
8.2.70.0080.00017.78
8.2.60.0000.00818.05
8.2.50.0000.00918.10
8.2.40.0080.00020.61
8.2.30.0030.00519.40
8.2.20.0050.00317.63
8.2.10.0050.00317.68
8.2.00.0050.00317.66
8.1.280.0040.01125.92
8.1.270.0040.00423.99
8.1.260.0000.00726.35
8.1.250.0000.00728.09
8.1.240.0030.00619.21
8.1.230.0040.00819.10
8.1.220.0040.00417.79
8.1.210.0040.00418.77
8.1.200.0000.00917.22
8.1.190.0000.00917.23
8.1.180.0080.00018.10
8.1.170.0040.00418.64
8.1.160.0040.00418.93
8.1.150.0050.00318.73
8.1.140.0000.00817.46
8.1.130.0000.00717.84
8.1.120.0070.00017.52
8.1.110.0000.00817.41
8.1.100.0000.00717.45
8.1.90.0000.00817.53
8.1.80.0040.00417.49
8.1.70.0000.00717.44
8.1.60.0070.00717.58
8.1.50.0020.00517.39
8.1.40.0040.00417.59
8.1.30.0050.00317.58
8.1.20.0090.00017.76
8.1.10.0080.00017.55
8.1.00.0070.00017.52
8.0.300.0040.00419.95
8.0.290.0040.00416.63
8.0.280.0040.00418.48
8.0.270.0000.00717.20
8.0.260.0070.00016.77
8.0.250.0040.00417.06
8.0.240.0040.00416.98
8.0.230.0000.00716.95
8.0.220.0040.00416.92
8.0.210.0030.00316.92
8.0.200.0000.00616.87
8.0.190.0040.00416.98
8.0.180.0070.00016.95
8.0.170.0070.00016.82
8.0.160.0070.00016.82
8.0.150.0050.00316.77
8.0.140.0040.00416.87
8.0.130.0000.00613.44
8.0.120.0070.00016.91
8.0.110.0080.00016.99
8.0.100.0080.00016.95
8.0.90.0000.00716.77
8.0.80.0140.00816.90
8.0.70.0000.00816.93
8.0.60.0070.00016.82
8.0.50.0070.00016.79
8.0.30.0090.01117.16
8.0.20.0080.01217.40
8.0.10.0000.00716.84
8.0.00.0120.00816.87
7.4.330.0020.00216.67
7.4.320.0000.00716.65
7.4.300.0040.00416.69
7.4.290.0040.00416.53
7.4.280.0070.00016.64
7.4.270.0070.00016.53
7.4.260.0030.00313.31
7.4.250.0040.00416.61
7.4.240.0070.00016.62
7.4.230.0050.00316.55
7.4.220.0070.01116.63
7.4.210.0080.00916.61
7.4.200.0070.00016.29
7.4.190.0080.00016.71
7.4.160.0100.00616.65
7.4.150.0120.01217.40
7.4.140.0120.00517.86
7.4.130.0090.00916.44
7.4.120.0090.00816.64
7.4.110.0160.00616.60
7.4.100.0120.01216.53
7.4.90.0150.00316.53
7.4.80.0070.01119.39
7.4.70.0090.00916.59
7.4.60.0070.01016.70
7.4.50.0000.00916.54
7.4.40.0120.00622.77
7.4.30.0110.00716.67
7.4.00.0060.00915.23
7.3.330.0030.00313.15
7.3.320.0000.00513.23
7.3.310.0000.00716.28
7.3.300.0000.00716.16
7.3.290.0100.00316.24
7.3.280.0040.01116.28
7.3.270.0050.01117.40
7.3.260.0120.00718.24
7.3.250.0120.00516.31
7.3.240.0030.01316.29
7.3.230.0030.01316.39
7.3.210.0190.00016.51
7.3.200.0070.01419.39
7.3.190.0100.00716.44
7.3.180.0170.00016.52
7.3.170.0050.01316.30
7.3.160.0050.01716.53
7.3.120.0080.00414.80
7.3.10.0030.01015.96
7.3.00.0060.00616.32
7.2.330.0100.01016.72
7.2.320.0170.00616.36
7.2.310.0090.00916.46
7.2.300.0090.00916.40
7.2.290.0100.00616.71
7.2.130.0060.00616.80
7.2.120.0070.01116.36
7.2.110.0190.00016.46
7.2.100.0090.00616.31
7.2.90.0030.00716.76
7.2.80.0030.00816.52
7.2.70.0150.00816.46
7.2.60.0080.01016.77
7.2.50.0140.00616.90
7.2.40.0090.00016.40
7.2.30.0060.01216.50
7.2.20.0090.01216.46
7.2.10.0120.00916.67
7.2.00.0070.01118.04
7.1.250.0120.00415.54
7.1.200.0070.00715.89
7.1.100.0030.01017.89
7.1.70.0000.00817.00
7.1.60.0120.01219.17
7.1.50.0070.01416.89
7.1.00.0030.03322.35
7.0.200.0000.00916.57
7.0.140.0000.07022.12
7.0.90.0070.04719.96
7.0.80.0370.05019.91
7.0.70.0100.04019.95
7.0.60.0100.07320.09
7.0.50.0500.04020.33
7.0.40.0100.06020.09
7.0.30.0170.07020.08
7.0.20.0070.08320.18
7.0.10.0130.04320.07
7.0.00.0100.03720.17
5.6.280.0070.07020.94
5.6.240.0130.05320.65
5.6.230.0030.08720.56
5.6.220.0130.06720.73
5.6.210.0030.08020.79
5.6.200.0030.06321.06
5.6.190.0100.07720.96
5.6.180.0170.03721.02
5.6.170.0200.03721.13
5.6.160.0030.07021.06
5.6.150.0130.07720.97
5.6.140.0000.07021.12
5.6.130.0130.08321.02
5.6.120.0130.05721.08
5.6.110.0030.08721.01
5.6.100.0230.06321.05
5.6.90.0070.04321.00
5.6.80.0100.07320.51
5.6.70.0130.07020.52
5.6.60.0130.07720.50
5.6.50.0200.06720.43
5.6.40.0070.06720.42
5.6.30.0070.08020.55
5.6.20.0100.08320.32
5.6.10.0030.08720.45
5.6.00.0100.07320.52
5.5.380.0030.08020.47
5.5.370.0130.06320.47
5.5.360.0070.07720.40
5.5.350.0070.04720.48
5.5.340.0070.09020.78
5.5.330.0170.07020.78
5.5.320.0030.05320.82
5.5.310.0130.07720.93
5.5.300.0100.04320.89
5.5.290.0070.04720.90
5.5.280.0100.07020.66
5.5.270.0070.05720.91
5.5.260.0230.06020.73
5.5.250.0030.04320.62
5.5.240.0130.08020.26
5.5.230.0100.08020.28
5.5.220.0030.08720.16
5.5.210.0100.05020.04
5.5.200.0130.08320.26
5.5.190.0100.08020.29
5.5.180.0030.08020.20
5.5.160.0070.08320.26
5.5.150.0130.06720.01
5.5.140.0100.04020.25
5.5.130.0070.08020.23
5.5.120.0130.07720.25
5.5.110.0100.08020.25
5.5.100.0100.07720.09
5.5.90.0130.05020.08
5.5.80.0030.07720.11
5.5.70.0130.06720.03
5.5.60.0030.06020.16
5.5.50.0070.07720.10
5.5.40.0130.06020.11
5.5.30.0100.07720.15
5.5.20.0170.03720.13
5.5.10.0070.04720.09
5.5.00.0030.07720.12
5.4.450.0070.08019.49
5.4.440.0200.04319.45
5.4.430.0100.07719.44
5.4.420.0100.07719.36
5.4.410.0130.07019.24
5.4.400.0130.06719.14
5.4.390.0030.05719.03
5.4.380.0100.07319.13
5.4.370.0030.04719.25
5.4.360.0130.07318.90
5.4.350.0170.06319.13
5.4.340.0000.09319.12
5.4.320.0070.05719.13
5.4.310.0070.07319.13
5.4.300.0070.04019.12
5.4.290.0230.03019.18
5.4.280.0070.07319.09
5.4.270.0070.05318.87
5.4.260.0070.06719.16
5.4.250.0000.06019.22
5.4.240.0030.08319.19
5.4.230.0130.06719.22
5.4.220.0100.07319.02
5.4.210.0070.06719.00
5.4.200.0070.03719.22
5.4.190.0100.07019.03
5.4.180.0070.07019.02
5.4.170.0070.07019.04
5.4.160.0100.07019.10
5.4.150.0100.04718.84
5.4.140.0070.08016.35
5.4.130.0100.04716.46
5.4.120.0130.04716.43
5.4.110.0030.07016.39
5.4.100.0000.04016.45
5.4.90.0070.03316.49
5.4.80.0070.05716.46
5.4.70.0030.04016.54
5.4.60.0030.07016.47
5.4.50.0030.08016.36
5.4.40.0030.07316.46
5.4.30.0100.05316.44
5.4.20.0070.06016.49
5.4.10.0000.04316.41
5.4.00.0030.06015.81
5.3.290.0030.04314.69
5.3.280.0130.05314.60
5.3.270.0100.07714.60
5.3.260.0070.07014.58
5.3.250.0070.07314.71
5.3.240.0130.04014.62
5.3.230.0070.03714.61
5.3.220.0030.07314.68
5.3.210.0100.04314.65
5.3.200.0030.04714.58
5.3.190.0030.08014.60
5.3.180.0030.05014.67
5.3.170.0070.06714.55
5.3.160.0100.05314.68
5.3.150.0070.04314.66
5.3.140.0130.07314.70
5.3.130.0000.04314.61
5.3.120.0100.06014.60
5.3.110.0100.04714.64
5.3.100.0070.07714.13
5.3.90.0130.03314.06
5.3.80.0070.06314.09
5.3.70.0100.07314.17
5.3.60.0030.06014.15
5.3.50.0100.06014.08
5.3.40.0070.06314.08
5.3.30.0070.03013.84
5.3.20.0000.03713.70
5.3.10.0030.07013.67
5.3.00.0070.05713.71
5.2.170.0030.03311.19
5.2.160.0000.05711.06
5.2.150.0030.06011.23
5.2.140.0000.06311.05
5.2.130.0000.02711.12
5.2.120.0000.02711.12
5.2.110.0030.05311.25
5.2.100.0130.01711.04
5.2.90.0000.02711.12
5.2.80.0030.03311.24
5.2.70.0030.03011.26
5.2.60.0030.02710.94
5.2.50.0030.02711.17
5.2.40.0030.02311.11
5.2.30.0030.02310.86
5.2.20.0000.02711.11
5.2.10.0000.02711.01
5.2.00.0030.04310.86
5.1.60.0030.02310.08
5.1.50.0000.02310.06
5.1.40.0000.02710.02
5.1.30.0000.03010.38
5.1.20.0070.02310.43
5.1.10.0030.02710.01
5.1.00.0000.0239.95
5.0.50.0000.0208.60
5.0.40.0000.0308.57
5.0.30.0100.0208.28
5.0.20.0000.0478.32
5.0.10.0000.0378.29
5.0.00.0070.0338.29
4.4.90.0000.0177.62
4.4.80.0000.0177.62
4.4.70.0030.0137.62
4.4.60.0000.0137.62
4.4.50.0070.0107.62
4.4.40.0000.0307.62
4.4.30.0030.0137.62
4.4.20.0000.0137.62
4.4.10.0030.0137.62
4.4.00.0000.0277.62
4.3.110.0000.0177.62
4.3.100.0030.0207.62
4.3.90.0000.0307.62
4.3.80.0030.0207.62
4.3.70.0030.0337.62
4.3.60.0000.0177.62
4.3.50.0070.0107.62
4.3.40.0030.0207.62
4.3.30.0000.0137.62
4.3.20.0000.0177.62
4.3.10.0000.0137.62
4.3.00.0000.0377.62

preferences:
50.66 ms | 401 KiB | 5 Q