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) { $k = _js_enc_value($k); if ($k === 'null') { $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($value); case !_js_check_utf8($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) { $pattern = "@[\x08-\x10\x0c\x0d\\\\\"/]|([^\x08-\x10\x0c\x0d\x32-\x7f\\\\\"/])++@"; return '"' . preg_replace_callback($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\\\"/"); } } function _js_check_utf8($str) { $len = strlen($str); for($i = 0; $i < $len; $i++){ $c = ord($str[$i]); if ($c > 128) { if ($c > 247) { return false; } elseif ($c > 239) { $bytes = 4; } elseif ($c > 223) { $bytes = 3; } elseif ($c > 191) { $bytes = 2; } else { return false; } if (($i + $bytes) > $len) { return false; } while ($bytes > 1) { $i++; $b = ord($str[$i]); if ($b < 128 || $b > 191) { return false; } $bytes--; } } } return true; } } $str = ''; for ($i=0;$i<=300;$i++) { $str .= chr($i); } $str .= chr(127); var_dump(json_encode(array("" => "", 1 => "")));

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)
8.3.60.0100.00716.72
8.3.50.0050.01021.97
8.3.40.0070.00719.02
8.3.30.0070.00718.95
8.3.20.0060.00320.18
8.3.10.0040.00423.66
8.3.00.0080.00020.80
8.2.180.0150.00016.37
8.2.170.0120.00322.96
8.2.160.0030.01020.39
8.2.150.0080.00024.18
8.2.140.0000.00824.66
8.2.130.0110.00426.16
8.2.120.0040.00422.25
8.2.110.0050.00522.24
8.2.100.0090.00317.91
8.2.90.0030.00519.29
8.2.80.0000.00917.97
8.2.70.0080.00017.75
8.2.60.0030.00618.04
8.2.50.0000.00818.07
8.2.40.0000.00818.16
8.2.30.0000.00818.27
8.2.20.0040.00417.65
8.2.10.0020.00517.68
8.2.00.0000.00817.72
8.1.280.0120.00925.92
8.1.270.0030.00522.19
8.1.260.0040.00426.35
8.1.250.0040.00428.09
8.1.240.0060.00323.93
8.1.230.0090.00319.09
8.1.220.0000.00817.74
8.1.210.0050.00318.77
8.1.200.0030.00617.22
8.1.190.0040.00417.52
8.1.180.0090.00018.10
8.1.170.0090.00018.58
8.1.160.0040.00422.06
8.1.150.0000.00718.64
8.1.140.0040.00417.49
8.1.130.0030.00317.87
8.1.120.0000.00717.39
8.1.110.0040.00417.53
8.1.100.0070.00017.48
8.1.90.0000.00717.53
8.1.80.0040.00417.39
8.1.70.0000.00717.42
8.1.60.0030.00617.62
8.1.50.0030.00617.61
8.1.40.0000.00817.55
8.1.30.0040.00417.52
8.1.20.0040.00417.76
8.1.10.0030.00617.39
8.1.00.0000.01017.50
8.0.300.0050.00318.77
8.0.290.0060.00317.16
8.0.280.0000.00818.36
8.0.270.0000.00717.17
8.0.260.0030.00516.87
8.0.250.0030.00316.90
8.0.240.0030.00317.00
8.0.230.0030.00516.88
8.0.220.0030.00516.84
8.0.210.0000.00716.84
8.0.200.0030.00316.88
8.0.190.0000.00816.95
8.0.180.0000.00816.85
8.0.170.0050.00216.93
8.0.160.0050.00216.92
8.0.150.0040.00416.79
8.0.140.0070.00016.97
8.0.130.0000.00613.32
8.0.120.0000.00916.92
8.0.110.0050.00316.93
8.0.100.0000.00716.89
8.0.90.0050.00216.94
8.0.80.0070.01016.93
8.0.70.0050.00216.84
8.0.60.0060.00316.79
8.0.50.0030.00516.80
8.0.30.0070.01217.16
8.0.20.0100.00817.41
8.0.10.0000.00716.83
8.0.00.0030.01616.73
7.4.330.0000.00515.20
7.4.320.0060.00016.67
7.4.300.0040.00416.63
7.4.290.0040.00416.43
7.4.280.0000.00716.57
7.4.270.0000.00816.47
7.4.260.0070.00316.43
7.4.250.0050.00316.36
7.4.240.0030.00416.53
7.4.230.0050.00316.55
7.4.220.0120.00616.54
7.4.210.0020.01316.61
7.4.200.0040.00416.60
7.4.190.0000.00816.49
7.4.160.0080.00816.59
7.4.150.0120.00617.40
7.4.140.0060.01217.86
7.4.130.0060.01216.52
7.4.120.0080.01016.50
7.4.110.0090.00916.58
7.4.100.0070.01316.67
7.4.90.0150.00316.34
7.4.80.0120.00619.39
7.4.70.0170.00316.59
7.4.60.0100.00716.38
7.4.50.0000.00716.28
7.4.40.0000.01622.77
7.4.30.0170.00016.48
7.4.00.0030.01314.87
7.3.330.0030.00313.29
7.3.320.0050.00013.34
7.3.310.0060.00016.35
7.3.300.0040.00416.20
7.3.290.0000.01516.26
7.3.280.0090.00816.33
7.3.270.0060.01117.40
7.3.260.0070.01116.63
7.3.250.0130.00816.54
7.3.240.0140.00516.61
7.3.230.0090.00916.62
7.3.210.0140.00316.48
7.3.200.0040.01319.39
7.3.190.0120.00616.38
7.3.180.0070.00716.51
7.3.170.0110.01116.32
7.3.160.0040.01216.63
7.3.120.0100.00714.79
7.3.110.0060.00914.77
7.3.100.0100.01015.13
7.3.90.0060.00914.91
7.3.80.0040.01214.99
7.3.70.0000.00914.95
7.3.60.0030.01314.91
7.3.50.0070.00714.92
7.3.40.0090.00614.99
7.3.30.0090.00614.76
7.3.20.0070.00716.56
7.3.10.0000.01716.71
7.3.00.0120.00616.60
7.2.330.0120.00616.71
7.2.320.0060.01216.57
7.2.310.0030.01716.57
7.2.300.0120.01216.68
7.2.290.0080.00816.39
7.2.250.0080.01114.94
7.2.240.0100.00715.12
7.2.230.0060.01014.87
7.2.220.0100.00614.99
7.2.210.0000.01215.29
7.2.200.0040.01215.16
7.2.190.0070.01015.22
7.2.180.0030.01014.70
7.2.170.0110.00414.93
7.2.160.0090.00014.95
7.2.150.0100.00316.79
7.2.140.0060.01017.11
7.2.130.0070.00716.77
7.2.120.0060.00917.00
7.2.110.0070.01016.95
7.2.100.0040.01216.98
7.2.90.0040.01116.69
7.2.80.0040.01116.71
7.2.70.0060.00616.80
7.2.60.0060.00617.05
7.2.50.0030.01016.92
7.2.40.0060.00616.80
7.2.30.0030.01317.03
7.2.20.0060.00616.86
7.2.10.0110.00316.81
7.2.00.0090.00316.88
7.1.330.0040.01515.95
7.1.320.0040.01115.94
7.1.310.0100.00315.54
7.1.300.0100.00315.86
7.1.290.0090.00615.82
7.1.280.0030.01015.84
7.1.270.0100.00315.63
7.1.260.0060.01215.68
7.1.250.0070.00715.63
7.1.240.0060.00615.82
7.1.230.0080.00615.76
7.1.220.0070.00315.75
7.1.210.0070.00715.58
7.1.200.0110.00315.72
7.1.190.0110.00315.75
7.1.180.0070.00715.63
7.1.170.0040.01115.52
7.1.160.0100.00315.69
7.1.150.0030.01015.98
7.1.140.0040.01115.75
7.1.130.0070.00715.99
7.1.120.0000.00915.83
7.1.110.0030.00915.96
7.1.100.0110.00415.89
7.1.90.0000.01115.83
7.1.80.0000.01215.64
7.1.70.0040.00716.30
7.1.60.0080.00817.58
7.1.50.0090.00916.39
7.1.40.0070.00315.53
7.1.30.0060.00615.60
7.1.20.0040.01115.55
7.1.10.0060.00615.69
7.1.00.0050.04118.97
7.0.330.0000.01215.63
7.0.320.0060.00615.57
7.0.310.0000.00815.43
7.0.300.0110.00315.52
7.0.290.0040.00715.55
7.0.280.0030.01015.43
7.0.270.0060.00915.30
7.0.260.0030.00915.60
7.0.250.0000.01415.32
7.0.240.0040.00715.45
7.0.230.0060.00615.68
7.0.220.0080.00315.45
7.0.210.0000.00915.45
7.0.200.0060.00516.20
7.0.190.0050.00515.50
7.0.180.0030.01215.17
7.0.170.0030.00915.14
7.0.160.0060.00615.28
7.0.150.0060.00915.54
7.0.140.0070.03818.57
7.0.130.0130.00015.33
7.0.120.0030.01015.43
7.0.110.0040.00415.62
7.0.100.0000.00815.34
7.0.90.0380.04317.64
7.0.80.0220.03917.55
7.0.70.0330.04017.86
7.0.60.0280.03317.65
7.0.50.0340.04017.90
7.0.40.0100.03516.79
7.0.30.0030.03216.83
7.0.20.0050.04616.67
7.0.10.0060.03916.72
7.0.00.0030.05016.82
5.6.400.0090.00914.52
5.6.390.0060.00614.39
5.6.380.0030.01214.56
5.6.370.0030.00614.31
5.6.360.0040.00714.35
5.6.350.0060.00614.59
5.6.340.0040.00814.66
5.6.330.0110.00014.25
5.6.320.0120.00314.52
5.6.310.0080.00414.61
5.6.300.0000.00914.28
5.6.290.0030.01014.44
5.6.280.0050.04217.58
5.6.270.0120.00314.51
5.6.260.0040.01214.59
5.6.250.0060.00614.31
5.6.240.0090.04117.51
5.6.230.0070.04517.45
5.6.220.0040.04917.51
5.6.210.0120.03717.41
5.6.200.0130.04017.68
5.6.190.0060.04917.74
5.6.180.0060.04617.67
5.6.170.0100.03517.70
5.6.160.0100.04117.75
5.6.150.0080.02817.62
5.6.140.0020.04717.63
5.6.130.0050.02917.67
5.6.120.0030.05417.75
5.6.110.0100.04117.62
5.6.100.0080.02517.67
5.6.90.0070.03717.66
5.6.80.0030.03817.29
5.6.70.0050.02617.41
5.6.60.0100.03817.36
5.6.50.0070.04317.50
5.6.40.0070.03917.41
5.6.30.0040.03217.35
5.6.20.0100.04217.31
5.6.10.0050.04117.38
5.6.00.0070.04317.21
5.5.380.0100.03317.24
5.5.370.0060.03917.21
5.5.360.0100.04317.31
5.5.350.0110.04317.50
5.5.340.0050.04517.64
5.5.330.0070.04417.51
5.5.320.0030.03317.44
5.5.310.0050.04617.60
5.5.300.0070.04217.50
5.5.290.0050.04117.61
5.5.280.0050.03817.54
5.5.270.0080.04517.59
5.5.260.0100.02517.56
5.5.250.0060.04017.42
5.5.240.0050.04217.19
5.5.230.0030.02917.10
5.5.220.0060.04017.09
5.5.210.0070.02717.28
5.5.200.0080.04017.21
5.5.190.0090.02717.19
5.5.180.0080.03917.35
5.5.170.0030.01213.92
5.5.160.0080.03317.31
5.5.150.0090.03217.16
5.5.140.0070.04217.22
5.5.130.0030.04717.15
5.5.120.0070.04017.06
5.5.110.0050.02517.19
5.5.100.0070.04117.23
5.5.90.0020.04517.14
5.5.80.0080.03817.12
5.5.70.0060.03517.12
5.5.60.0080.03917.08
5.5.50.0030.04417.10
5.5.40.0050.04417.21
5.5.30.0000.02817.23
5.5.20.0120.02017.14
5.5.10.0090.02017.22
5.5.00.0020.02717.17
5.4.450.0090.04016.10
5.4.440.0020.03116.14
5.4.430.0050.04016.03
5.4.420.0030.03516.18
5.4.410.0020.02615.97
5.4.400.0060.02915.91
5.4.390.0060.04316.01
5.4.380.0060.02315.99
5.4.370.0040.04115.95
5.4.360.0030.04016.04
5.4.350.0030.02615.96
5.4.340.0050.04215.95
5.4.330.0090.00312.87
5.4.320.0040.02615.96
5.4.310.0030.03816.02
5.4.300.0070.04015.88
5.4.290.0030.04315.87
5.4.280.0050.02816.01
5.4.270.0060.02815.98
5.4.260.0130.03515.95
5.4.250.0080.03515.98
5.4.240.0070.03715.87
5.4.230.0090.03215.87
5.4.220.0030.04616.04
5.4.210.0050.02515.95
5.4.200.0020.02515.95
5.4.190.0050.02815.97
5.4.180.0080.01616.04
5.4.170.0090.02315.90
5.4.160.0020.02515.99
5.4.150.0020.02616.03
5.4.140.0020.03914.64
5.4.130.0000.02514.65
5.4.120.0030.04014.66
5.4.110.0010.02114.71
5.4.100.0060.02114.71
5.4.90.0120.03414.71
5.4.80.0000.02514.67
5.4.70.0080.02014.68
5.4.60.0110.01114.64
5.4.50.0040.03314.60
5.4.40.0070.01714.68
5.4.30.0050.02614.69
5.4.20.0070.01814.57
5.4.10.0030.02714.60
5.4.00.0050.01814.34
5.3.290.0110.03613.86
5.3.280.0030.03413.80
5.3.270.0050.02113.81
5.3.260.0030.03013.80
5.3.250.0060.01813.75
5.3.240.0000.02613.82
5.3.230.0020.04413.76
5.3.220.0020.03713.76
5.3.210.0060.02813.72
5.3.200.0030.02213.69
5.3.190.0040.02013.71
5.3.180.0040.02313.77
5.3.170.0050.02113.76
5.3.160.0020.02813.76
5.3.150.0000.02613.70
5.3.140.0090.01513.70
5.3.130.0030.02313.75
5.3.120.0050.02313.75
5.3.110.0020.02313.75
5.3.100.0040.02213.47
5.3.90.0020.02413.47
5.3.80.0060.01913.42
5.3.70.0060.02013.46
5.3.60.0050.02113.52
5.3.50.0030.01913.46
5.3.40.0090.01913.39
5.3.30.0030.02313.41
5.3.20.0020.02113.29
5.3.10.0050.01713.33
5.3.00.0000.02213.30
5.2.170.0000.03311.21
5.2.160.0070.04011.18
5.2.150.0030.03711.11
5.2.140.0000.03011.20
5.2.130.0070.02011.27
5.2.120.0070.02711.19
5.2.110.0030.04711.24
5.2.100.0030.04311.07
5.2.90.0030.04311.16
5.2.80.0030.02711.27
5.2.70.0030.05711.24
5.2.60.0100.02711.11
5.2.50.0000.03011.16
5.2.40.0030.02710.92
5.2.30.0100.03711.11
5.2.20.0000.03311.08
5.2.10.0000.04010.75
5.2.00.0000.03010.81
5.1.60.0030.02710.14
5.1.50.0030.02310.05
5.1.40.0070.02010.09
5.1.30.0030.02010.23
5.1.20.0070.02710.34
5.1.10.0100.05010.18
5.1.00.0030.05710.23
5.0.50.0100.0338.46
5.0.40.0000.0338.32
5.0.30.0130.0438.32
5.0.20.0100.0408.26
5.0.10.0030.0408.12
5.0.00.0000.0578.30
4.4.90.0030.0277.32
4.4.80.0000.0177.32
4.4.70.0000.0177.32
4.4.60.0030.0137.32
4.4.50.0030.0237.32
4.4.40.0030.0237.32
4.4.30.0000.0177.32
4.4.20.0000.0277.32
4.4.10.0000.0337.32
4.4.00.0000.0477.32
4.3.110.0030.0337.32
4.3.100.0000.0377.32
4.3.90.0000.0377.32
4.3.80.0000.0577.32
4.3.70.0000.0407.32
4.3.60.0100.0237.32
4.3.50.0070.0377.32
4.3.40.0070.0437.32
4.3.30.0070.0307.32
4.3.20.0000.0407.32
4.3.10.0030.0337.32
4.3.00.0000.0337.32

preferences:
44.19 ms | 401 KiB | 5 Q