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); } $i = 0; if (!$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) { $k = '"'. addcslashes($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) && _js_error(): return 'null'; case is_string($value): return '"' . _js_uc_esc($value) . '"'; default: return $value; } } function _js_error() { return trigger_error('json_encode(): type is unsupported, encoded as null', E_USER_WARNING); } function _js_uc_esc($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)
8.3.60.0070.01416.88
8.3.50.0130.00817.48
8.3.40.0070.00718.67
8.3.30.0120.00618.84
8.3.20.0060.00318.77
8.3.10.0060.00320.26
8.3.00.0070.00419.34
8.2.180.0210.00017.00
8.2.170.0150.00422.96
8.2.160.0070.00721.04
8.2.150.0050.00324.18
8.2.140.0000.00824.66
8.2.130.0070.00026.16
8.2.120.0030.00619.22
8.2.110.0040.00421.12
8.2.100.0060.00618.03
8.2.90.0030.00619.47
8.2.80.0000.00719.25
8.2.70.0060.00317.61
8.2.60.0040.00418.04
8.2.50.0030.00618.07
8.2.40.0000.00918.22
8.2.30.0050.00218.18
8.2.20.0070.00217.70
8.2.10.0040.00417.71
8.2.00.0040.00417.88
8.1.280.0070.01025.92
8.1.270.0040.00424.66
8.1.260.0050.00326.35
8.1.250.0000.00728.09
8.1.240.0060.00323.82
8.1.230.0110.00021.10
8.1.220.0000.00817.74
8.1.210.0050.00319.09
8.1.200.0000.01017.48
8.1.190.0000.00817.64
8.1.180.0050.00318.10
8.1.170.0050.00318.96
8.1.160.0060.00318.83
8.1.150.0030.00518.61
8.1.140.0040.00417.58
8.1.130.0000.00717.94
8.1.120.0000.00817.44
8.1.110.0000.00717.54
8.1.100.0040.00417.50
8.1.90.0030.00517.42
8.1.80.0020.00517.53
8.1.70.0000.00817.47
8.1.60.0030.00617.66
8.1.50.0000.00817.44
8.1.40.0000.00817.45
8.1.30.0070.00017.61
8.1.20.0060.00317.56
8.1.10.0040.00417.54
8.1.00.0000.00817.45
8.0.300.0030.00520.07
8.0.290.0040.00416.88
8.0.280.0000.00718.57
8.0.270.0000.00717.26
8.0.260.0070.00016.95
8.0.250.0000.00816.98
8.0.240.0000.00817.10
8.0.230.0000.00716.98
8.0.220.0030.00316.98
8.0.210.0070.00017.09
8.0.200.0000.00617.08
8.0.190.0000.00817.05
8.0.180.0030.00616.93
8.0.170.0030.00616.97
8.0.160.0040.00416.94
8.0.150.0030.00617.02
8.0.140.0000.00816.91
8.0.130.0000.00613.50
8.0.120.0000.00817.03
8.0.110.0080.00016.96
8.0.100.0040.00416.91
8.0.90.0040.00416.87
8.0.80.0100.00616.90
8.0.70.0040.00417.05
8.0.60.0000.00817.09
8.0.50.0000.00817.01
8.0.30.0120.00717.06
8.0.20.0100.00817.33
8.0.10.0040.00417.00
8.0.00.0110.00816.72
7.4.330.0050.00013.05
7.4.320.0000.00616.57
7.4.300.0050.00516.49
7.4.290.0040.00416.57
7.4.280.0000.00716.71
7.4.270.0060.00316.71
7.4.260.0000.00513.32
7.4.250.0080.00016.58
7.4.240.0030.00516.63
7.4.230.0030.00316.64
7.4.220.0060.01216.61
7.4.210.0110.00716.72
7.4.200.0030.00616.65
7.4.190.0050.00216.75
7.4.160.0040.01816.55
7.4.150.0140.00316.51
7.4.140.0130.00616.56
7.4.130.0050.01416.61
7.4.120.0090.00916.58
7.4.110.0060.01216.87
7.4.100.0170.00016.84
7.4.90.0150.00416.82
7.4.80.0070.01019.39
7.4.70.0030.01416.73
7.4.60.0130.01016.56
7.4.50.0060.00316.54
7.4.40.0060.00616.55
7.4.30.0030.01316.68
7.4.00.0040.01414.92
7.3.330.0030.00313.22
7.3.320.0030.00313.18
7.3.310.0080.00016.31
7.3.300.0070.00016.38
7.3.290.0070.00716.28
7.3.280.0100.00616.35
7.3.270.0140.00416.31
7.3.260.0090.01116.50
7.3.250.0100.00816.47
7.3.240.0070.01316.45
7.3.230.0130.01016.23
7.3.210.0090.00916.18
7.3.200.0110.00716.21
7.3.190.0070.01016.52
7.3.180.0090.00616.40
7.3.170.0100.00716.29
7.3.160.0030.01316.54
7.3.120.0100.00614.52
7.2.330.0090.01316.81
7.2.320.0130.01016.64
7.2.310.0090.00916.37
7.2.300.0070.01016.70
7.2.290.0130.00616.46
7.2.00.0060.00919.54
7.1.100.0740.00616.33
7.1.70.0030.00617.04
7.1.60.0120.01219.40
7.1.50.0110.00316.88
7.1.00.0070.06722.27
7.0.200.0270.00814.77
7.0.140.0030.07722.12
7.0.120.0100.06722.04
7.0.110.0100.07720.01
7.0.100.0070.07719.90
7.0.90.0000.09019.86
7.0.80.0170.07019.87
7.0.70.0100.07019.85
7.0.60.0070.07020.06
7.0.50.0030.06020.42
7.0.40.0100.04720.25
7.0.30.0070.07720.25
7.0.20.0130.08020.05
7.0.10.0170.07020.07
7.0.00.0070.08320.02
5.6.280.0000.07721.14
5.6.260.0030.08320.71
5.6.250.0130.07720.63
5.6.240.0130.06720.66
5.6.230.0070.05320.57
5.6.220.0200.06720.70
5.6.210.0070.08320.65
5.6.200.0100.04721.01
5.6.190.0100.07721.01
5.6.180.0070.05721.31
5.6.170.0130.04321.23
5.6.160.0100.07321.17
5.6.150.0100.08021.07
5.6.140.0070.05720.96
5.6.130.0130.07321.16
5.6.120.0130.07021.10
5.6.110.0100.08321.28
5.6.100.0170.07021.06
5.6.90.0130.08021.21
5.6.80.0030.07720.53
5.6.70.0100.04720.42
5.6.60.0000.07720.53
5.6.50.0070.04320.34
5.6.40.0030.08020.58
5.6.30.0070.07720.52
5.6.20.0030.08320.30
5.6.10.0070.08320.66
5.6.00.0070.07720.46
5.5.380.0100.07320.35
5.5.370.0030.08720.34
5.5.360.0070.07720.47
5.5.350.0130.06720.49
5.5.340.0130.07320.97
5.5.330.0000.08320.98
5.5.320.0000.05720.80
5.5.310.0130.08020.98
5.5.300.0170.07320.82
5.5.290.0070.08320.86
5.5.280.0000.08320.79
5.5.270.0100.05021.04
5.5.260.0070.08320.89
5.5.250.0170.07020.77
5.5.240.0100.07320.18
5.5.230.0100.07720.34
5.5.220.0100.07720.38
5.5.210.0170.06720.23
5.5.200.0030.08020.18
5.5.190.0100.07320.11
5.5.180.0100.07020.27
5.5.160.0100.07320.18
5.5.150.0100.06320.23
5.5.140.0130.07020.23
5.5.130.0130.03320.17
5.5.120.0030.07320.35
5.5.110.0130.07320.40
5.5.100.0000.06020.16
5.5.90.0130.07720.18
5.5.80.0030.07320.02
5.5.70.0100.07320.01
5.5.60.0030.07020.11
5.5.50.0000.08020.17
5.5.40.0070.07320.21
5.5.30.0070.07720.18
5.5.20.0070.08020.14
5.5.10.0130.06320.05
5.5.00.0070.07320.19
5.4.450.0130.07319.34
5.4.440.0030.08719.55
5.4.430.0200.06319.55
5.4.420.0130.07019.50
5.4.410.0130.07719.21
5.4.400.0030.05319.25
5.4.390.0170.07019.02
5.4.380.0130.06719.03
5.4.370.0070.06719.00
5.4.360.0130.07019.01
5.4.350.0100.07319.35
5.4.340.0170.06319.04
5.4.320.0030.08019.18
5.4.310.0070.06319.09
5.4.300.0100.07319.00
5.4.290.0130.04319.33
5.4.280.0000.05319.02
5.4.270.0230.05718.96
5.4.260.0100.06719.03
5.4.250.0130.07019.22
5.4.240.0030.08719.01
5.4.230.0070.07719.32
5.4.220.0070.07718.98
5.4.210.0100.06319.22
5.4.200.0030.06719.18
5.4.190.0130.06319.15
5.4.180.0100.07319.00
5.4.170.0100.04019.07
5.4.160.0070.07318.96
5.4.150.0000.08319.14
5.4.140.0070.06316.51
5.4.130.0030.06016.62
5.4.120.0130.06716.39
5.4.110.0100.04316.62
5.4.100.0170.05016.37
5.4.90.0170.06716.68
5.4.80.0100.06716.45
5.4.70.0030.07716.30
5.4.60.0100.07016.57
5.4.50.0100.06716.47
5.4.40.0070.07016.52
5.4.30.0130.06316.29
5.4.20.0000.07016.46
5.4.10.0100.07316.43
5.4.00.0130.07015.74
5.3.290.0030.08014.55
5.3.280.0030.06714.65
5.3.270.0030.07314.64
5.3.260.0070.07714.76
5.3.250.0130.06314.65
5.3.240.0030.04014.63
5.3.230.0130.07014.64
5.3.220.0200.06314.59
5.3.210.0100.07714.69
5.3.200.0030.06714.61
5.3.190.0130.07314.58
5.3.180.0070.07314.67
5.3.170.0100.06714.72
5.3.160.0070.04314.60
5.3.150.0100.07314.60
5.3.140.0100.07314.73
5.3.130.0170.06314.59
5.3.120.0100.07314.59
5.3.110.0070.07714.43
5.3.100.0070.07014.06
5.3.90.0100.07314.06
5.3.80.0100.07014.04
5.3.70.0000.08014.18
5.3.60.0070.06714.01
5.3.50.0100.06713.97
5.3.40.0100.07314.21
5.3.30.0100.06313.96
5.3.20.0130.04013.85
5.3.10.0130.06013.64
5.3.00.0070.07013.81
5.2.170.0000.06711.86
5.2.160.0000.06711.86
5.2.150.0070.03011.86
5.2.140.0000.06311.86
5.2.130.0030.05711.86
5.2.120.0070.05711.86
5.2.110.0030.06011.86
5.2.100.0070.06311.86
5.2.90.0030.05711.86
5.2.80.0030.06711.86
5.2.70.0070.06011.86
5.2.60.0030.06311.86
5.2.50.0100.05311.86
5.2.40.0130.05311.86
5.2.30.0100.06311.86
5.2.20.0000.05711.86
5.2.10.0130.05011.86
5.2.00.0030.06311.86
5.1.60.0030.05011.86
5.1.50.0030.05311.86
5.1.40.0030.05311.86
5.1.30.0070.03711.86
5.1.20.0070.05011.86
5.1.10.0070.05311.86
5.1.00.0100.05011.86
5.0.50.0030.04711.86
5.0.40.0100.03311.86
5.0.30.0100.03711.86
5.0.20.0030.04311.86
5.0.10.0070.03011.86
5.0.00.0070.05311.86
4.4.90.0070.03011.86
4.4.80.0000.03311.86
4.4.70.0030.03311.86
4.4.60.0100.03011.86
4.4.50.0030.03711.86
4.4.40.0000.06011.86
4.4.30.0030.03311.86
4.4.20.0070.03311.86
4.4.10.0030.03711.86
4.4.00.0000.05311.86
4.3.110.0100.02711.86
4.3.100.0070.03011.86
4.3.90.0030.03011.86
4.3.80.0000.05311.86
4.3.70.0000.03711.86
4.3.60.0030.03311.86
4.3.50.0000.03711.86
4.3.40.0030.05311.86
4.3.30.0000.03311.86
4.3.20.0030.02011.87
4.3.10.0000.03711.88
4.3.00.0030.03311.89

preferences:
58.52 ms | 401 KiB | 5 Q