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)
8.3.60.0140.00716.88
8.3.50.0080.01117.67
8.3.40.0080.00818.70
8.3.30.0110.00418.67
8.3.20.0050.00318.95
8.3.10.0060.00320.28
8.3.00.0050.00519.14
8.2.180.0070.01118.54
8.2.170.0030.01422.96
8.2.160.0120.00320.41
8.2.150.0040.00724.18
8.2.140.0040.00424.66
8.2.130.0080.00026.16
8.2.120.0040.00421.05
8.2.110.0060.00620.98
8.2.100.0110.00017.84
8.2.90.0030.00619.33
8.2.80.0030.00519.25
8.2.70.0040.00417.63
8.2.60.0050.00317.91
8.2.50.0060.00318.07
8.2.40.0000.00718.22
8.2.30.0040.00418.11
8.2.20.0040.00417.66
8.2.10.0050.00217.72
8.2.00.0030.00617.68
8.1.280.0110.01125.92
8.1.270.0040.00424.66
8.1.260.0130.00326.35
8.1.250.0040.00428.09
8.1.240.0060.00323.84
8.1.230.0060.00620.85
8.1.220.0000.00817.74
8.1.210.0040.00418.88
8.1.200.0030.00617.35
8.1.190.0030.00617.53
8.1.180.0040.00418.10
8.1.170.0040.00418.91
8.1.160.0070.00018.88
8.1.150.0000.00718.69
8.1.140.0000.00817.50
8.1.130.0000.00717.88
8.1.120.0040.00417.52
8.1.110.0030.00517.43
8.1.100.0000.00717.52
8.1.90.0040.00417.40
8.1.80.0000.00717.39
8.1.70.0030.00317.40
8.1.60.0030.00517.58
8.1.50.0040.00417.45
8.1.40.0000.00817.55
8.1.30.0000.00817.69
8.1.20.0060.00317.69
8.1.10.0060.00317.55
8.1.00.0000.00817.57
8.0.300.0040.00420.29
8.0.290.0000.00716.75
8.0.280.0030.00318.50
8.0.270.0000.00717.38
8.0.260.0030.00316.93
8.0.250.0040.00417.01
8.0.240.0000.00717.05
8.0.230.0030.00317.08
8.0.220.0000.00816.99
8.0.210.0000.00716.89
8.0.200.0060.00317.07
8.0.190.0050.00217.05
8.0.180.0040.00416.99
8.0.170.0000.00816.95
8.0.160.0030.00317.02
8.0.150.0000.00716.84
8.0.140.0000.00717.00
8.0.130.0040.00413.46
8.0.120.0030.00516.95
8.0.110.0040.00416.86
8.0.100.0000.00816.97
8.0.90.0030.00517.05
8.0.80.0060.01217.02
8.0.70.0000.00717.06
8.0.60.0000.00716.88
8.0.50.0050.00316.89
8.0.30.0160.00417.08
8.0.20.0070.01217.17
8.0.10.0070.00017.02
8.0.00.0110.00616.69
7.4.330.0030.00313.03
7.4.320.0080.00016.52
7.4.300.0060.00016.57
7.4.290.0070.00016.54
7.4.280.0080.00016.54
7.4.270.0000.00716.57
7.4.260.0050.00013.22
7.4.250.0020.00516.50
7.4.240.0000.00716.50
7.4.230.0000.00716.39
7.4.220.0130.01016.50
7.4.210.0070.00816.62
7.4.200.0030.00316.55
7.4.190.0040.00416.80
7.4.160.0060.00916.63
7.4.150.0130.00416.49
7.4.140.0160.00516.70
7.4.130.0100.01016.62
7.4.120.0080.00916.57
7.4.110.0160.00316.69
7.4.100.0080.00916.63
7.4.90.0180.00016.59
7.4.80.0090.00919.39
7.4.70.0040.01216.48
7.4.60.0060.01016.59
7.4.50.0130.00016.62
7.4.40.0030.01016.56
7.4.30.0100.00616.71
7.4.00.0080.00814.98
7.3.330.0000.00713.31
7.3.320.0000.00713.17
7.3.310.0070.00016.30
7.3.300.0000.00716.35
7.3.290.0100.00616.35
7.3.280.0090.00916.36
7.3.270.0090.00916.53
7.3.260.0090.00916.35
7.3.250.0200.01316.44
7.3.240.0070.01016.62
7.3.230.0140.00316.65
7.3.210.0100.00616.50
7.3.200.0200.00016.30
7.3.190.0080.00916.28
7.3.180.0100.01016.33
7.3.170.0060.01216.42
7.3.160.0090.01316.32
7.3.120.0040.01114.79
7.2.330.0090.00916.60
7.2.320.0100.00716.54
7.2.310.0110.00816.48
7.2.300.0090.01216.37
7.2.290.0070.01016.76
7.1.100.0120.00317.89
7.1.70.0070.00017.00
7.1.60.0070.01719.40
7.1.50.0100.00016.60
7.1.00.0030.03322.45
7.0.200.0070.00715.07
7.0.140.0000.07022.18
7.0.120.0100.04722.04
7.0.90.0330.05320.04
7.0.80.0400.03319.89
7.0.70.0430.04020.16
7.0.60.0430.03720.09
7.0.50.0400.03720.37
7.0.40.0000.05020.11
7.0.30.0070.05020.09
7.0.20.0000.06320.19
7.0.10.0030.05020.18
7.0.00.0130.07720.09
5.6.280.0000.07721.00
5.6.240.0030.04020.68
5.6.230.0000.04020.52
5.6.220.0030.04720.66
5.6.210.0030.04020.69
5.6.200.0070.04020.99
5.6.190.0100.05721.19
5.6.180.0100.04321.13
5.6.170.0070.08021.05
5.6.160.0070.07021.08
5.6.150.0070.08020.98
5.6.140.0070.07721.06
5.6.130.0100.05321.15
5.6.120.0030.04721.02
5.6.110.0170.07321.03
5.6.100.0000.09020.96
5.6.90.0000.09021.02
5.6.80.0070.04720.43
5.6.70.0070.07320.44
5.6.60.0170.07720.43
5.6.50.0100.06320.48
5.6.40.0030.04720.48
5.6.30.0030.08720.39
5.6.20.0030.08320.30
5.6.10.0070.08020.30
5.6.00.0030.05020.42
5.5.380.0000.04020.58
5.5.370.0070.03320.56
5.5.360.0030.04020.35
5.5.350.0070.03720.49
5.5.340.0070.03720.93
5.5.330.0000.05720.82
5.5.320.0030.05020.93
5.5.310.0100.08020.85
5.5.300.0070.08020.93
5.5.290.0130.07320.84
5.5.280.0030.06720.79
5.5.270.0130.07720.93
5.5.260.0100.05320.65
5.5.250.0100.08020.71
5.5.240.0130.07720.21
5.5.230.0070.08320.13
5.5.220.0170.06020.28
5.5.210.0100.04320.28
5.5.200.0070.07320.24
5.5.190.0170.05720.16
5.5.180.0030.08320.28
5.5.160.0030.05320.27
5.5.150.0030.08320.00
5.5.140.0030.08720.19
5.5.130.0070.08020.22
5.5.120.0130.07720.25
5.5.110.0070.06719.96
5.5.100.0130.04020.11
5.5.90.0100.05020.11
5.5.80.0070.06320.18
5.5.70.0030.05720.15
5.5.60.0000.08320.02
5.5.50.0170.06020.07
5.5.40.0230.04020.21
5.5.30.0100.08020.15
5.5.20.0070.06320.15
5.5.10.0030.08720.05
5.5.00.0030.08020.05
5.4.450.0170.07319.46
5.4.440.0130.07319.27
5.4.430.0070.08019.45
5.4.420.0100.07019.53
5.4.410.0000.04319.31
5.4.400.0070.07319.21
5.4.390.0070.07019.04
5.4.380.0070.05719.03
5.4.370.0030.05319.03
5.4.360.0130.04719.21
5.4.350.0100.07019.18
5.4.340.0170.07019.05
5.4.320.0070.03719.18
5.4.310.0100.07719.03
5.4.300.0130.06718.85
5.4.290.0100.06319.13
5.4.280.0200.05318.95
5.4.270.0100.07318.85
5.4.260.0070.07319.09
5.4.250.0070.07719.14
5.4.240.0130.07019.16
5.4.230.0200.06319.22
5.4.220.0000.05018.85
5.4.210.0100.05019.09
5.4.200.0130.07019.04
5.4.190.0070.06019.21
5.4.180.0100.06719.03
5.4.170.0130.07019.15
5.4.160.0070.05318.85
5.4.150.0170.05319.03
5.4.140.0030.07316.44
5.4.130.0170.06016.50
5.4.120.0100.06316.41
5.4.110.0070.06716.55
5.4.100.0100.06016.45
5.4.90.0100.06016.48
5.4.80.0070.06316.46
5.4.70.0170.03316.36
5.4.60.0130.06016.34
5.4.50.0170.06016.40
5.4.40.0070.06316.54
5.4.30.0070.05316.37
5.4.20.0070.07716.46
5.4.10.0070.05716.40
5.4.00.0070.06715.81
5.3.290.0070.06014.70
5.3.280.0170.05314.59
5.3.270.0070.07314.60
5.3.260.0030.06314.72
5.3.250.0070.07314.64
5.3.240.0170.05714.70
5.3.230.0030.07714.59
5.3.220.0070.07014.61
5.3.210.0100.07314.58
5.3.200.0100.05014.73
5.3.190.0100.07014.59
5.3.180.0200.05314.61
5.3.170.0070.07014.73
5.3.160.0070.07014.71
5.3.150.0130.04014.60
5.3.140.0100.03714.57
5.3.130.0070.07314.50
5.3.120.0070.07714.68
5.3.110.0070.07714.58
5.3.100.0000.08014.16
5.3.90.0070.07014.03
5.3.80.0130.06014.05
5.3.70.0070.06014.03
5.3.60.0130.04314.19
5.3.50.0070.06014.00
5.3.40.0070.06713.97
5.3.30.0030.04713.92
5.3.20.0100.06013.77
5.3.10.0100.04313.63
5.3.00.0000.05013.71
5.2.170.0030.06011.29
5.2.160.0100.05311.28
5.2.150.0030.06011.29
5.2.140.0100.05311.30
5.2.130.0070.05011.27
5.2.120.0000.06011.04
5.2.110.0030.05711.04
5.2.100.0030.06011.21
5.2.90.0030.05311.16
5.2.80.0070.06311.18
5.2.70.0030.04011.13
5.2.60.0000.05711.18
5.2.50.0030.06311.11
5.2.40.0100.05310.93
5.2.30.0070.06011.05
5.2.20.0070.03710.98
5.2.10.0000.05710.98
5.2.00.0100.05310.78
5.1.60.0130.04710.02
5.1.50.0170.04710.13
5.1.40.0070.03710.09
5.1.30.0030.03010.40
5.1.20.0100.05710.38
5.1.10.0030.0539.96
5.1.00.0100.05010.14
5.0.50.0070.0378.66
5.0.40.0070.0378.35
5.0.30.0000.0338.38
5.0.20.0030.0408.32
5.0.10.0000.0508.32
5.0.00.0070.0608.30
4.4.90.0000.0377.17
4.4.80.0030.0337.17
4.4.70.0100.0107.17
4.4.60.0030.0237.17
4.4.50.0000.0237.17
4.4.40.0000.0537.17
4.4.30.0030.0377.17
4.4.20.0030.0377.17
4.4.10.0100.0307.17
4.4.00.0000.0507.17
4.3.110.0000.0237.17
4.3.100.0000.0177.17
4.3.90.0000.0307.17
4.3.80.0000.0407.17
4.3.70.0070.0307.17
4.3.60.0000.0307.17
4.3.50.0100.0277.17
4.3.40.0070.0507.17
4.3.30.0000.0377.17
4.3.20.0030.0277.17
4.3.10.0000.0377.17
4.3.00.0000.0237.17

preferences:
45.97 ms | 401 KiB | 5 Q