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("" => null)));

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)
8.3.70.0070.01416.50
8.3.60.0070.00718.31
8.3.50.0200.00721.92
8.3.40.0080.01118.84
8.3.30.0040.01219.01
8.3.20.0080.00020.34
8.3.10.0040.00421.85
8.3.00.0080.00022.39
8.2.190.0070.01116.58
8.2.180.0080.00816.38
8.2.170.0070.01022.96
8.2.160.0110.00321.02
8.2.150.0000.00824.18
8.2.140.0040.00424.66
8.2.130.0040.00426.16
8.2.120.0040.00419.30
8.2.110.0070.00421.96
8.2.100.0060.00617.72
8.2.90.0050.00319.39
8.2.80.0040.00417.97
8.2.70.0100.00017.63
8.2.60.0080.00017.93
8.2.50.0040.00418.07
8.2.40.0030.00518.16
8.2.30.0050.00218.21
8.2.20.0070.00017.80
8.2.10.0040.00417.77
8.2.00.0040.00417.59
8.1.280.0110.00425.92
8.1.270.0060.00322.14
8.1.260.0110.00726.35
8.1.250.0040.01428.09
8.1.240.0060.00323.76
8.1.230.0030.00719.11
8.1.220.0000.00817.74
8.1.210.0040.00418.77
8.1.200.0000.00917.35
8.1.190.0080.00017.53
8.1.180.0030.00618.10
8.1.170.0040.00418.71
8.1.160.0000.00721.98
8.1.150.0030.00618.73
8.1.140.0040.00417.54
8.1.130.0030.00317.88
8.1.120.0050.00317.41
8.1.110.0040.00417.43
8.1.100.0000.00717.57
8.1.90.0040.00417.50
8.1.80.0050.00217.42
8.1.70.0000.00717.37
8.1.60.0040.00417.52
8.1.50.0000.00717.46
8.1.40.0000.00817.56
8.1.30.0060.00317.54
8.1.20.0030.00617.60
8.1.10.0040.00417.44
8.1.00.0080.00017.33
8.0.300.0070.00018.77
8.0.290.0080.00017.04
8.0.280.0000.00718.43
8.0.270.0040.00417.23
8.0.260.0070.00016.91
8.0.250.0000.00717.04
8.0.240.0050.00216.87
8.0.230.0000.00716.88
8.0.220.0040.00416.95
8.0.210.0000.00816.81
8.0.200.0030.00316.98
8.0.190.0040.00416.98
8.0.180.0040.00416.98
8.0.170.0000.00717.00
8.0.160.0060.00316.95
8.0.150.0000.00716.80
8.0.140.0050.00316.74
8.0.130.0050.00013.39
8.0.120.0030.00516.89
8.0.110.0040.00416.77
8.0.100.0040.00416.73
8.0.90.0080.00017.01
8.0.80.0070.01116.93
8.0.70.0040.00416.79
8.0.60.0050.00216.91
8.0.50.0040.00417.00
8.0.30.0120.00917.18
8.0.20.0080.01117.40
8.0.10.0080.00016.89
8.0.00.0240.01116.79
7.4.330.0030.00315.07
7.4.320.0000.00616.45
7.4.300.0000.00616.52
7.4.290.0070.00016.69
7.4.280.0000.00716.61
7.4.270.0000.00716.54
7.4.260.0030.00316.43
7.4.250.0000.00816.45
7.4.240.0020.00616.48
7.4.230.0030.00316.62
7.4.220.0100.01016.52
7.4.210.0050.01016.51
7.4.200.0070.00016.32
7.4.190.0050.00316.62
7.4.160.0060.00916.48
7.4.150.0120.00617.40
7.4.140.0130.00617.86
7.4.130.0120.00616.33
7.4.120.0090.00916.50
7.4.110.0070.01016.50
7.4.100.0070.01116.46
7.4.90.0060.00916.52
7.4.80.0160.00316.55
7.4.70.0130.01016.37
7.4.60.0070.01016.39
7.4.50.0000.00916.57
7.4.40.0040.01122.77
7.4.30.0090.00616.68
7.4.10.0030.01615.07
7.4.00.0080.00814.88
7.3.330.0030.00313.16
7.3.320.0030.00313.15
7.3.310.0030.00316.16
7.3.300.0040.00416.21
7.3.290.0060.00916.28
7.3.280.0070.00916.32
7.3.270.0150.00617.40
7.3.260.0090.00916.61
7.3.250.0120.00816.62
7.3.240.0100.00716.69
7.3.230.0060.01616.39
7.3.210.0140.00316.36
7.3.200.0070.01119.39
7.3.190.0030.01316.38
7.3.180.0090.01516.46
7.3.170.0100.00616.57
7.3.160.0110.00616.44
7.3.130.0100.00414.55
7.3.120.0090.00614.81
7.3.110.0090.00614.86
7.3.100.0060.00914.99
7.3.90.0080.00615.02
7.3.80.0030.01214.49
7.3.70.0060.01014.97
7.3.60.0090.00614.96
7.3.50.0090.00614.86
7.3.40.0100.00714.69
7.3.30.0030.01014.61
7.3.20.0040.00716.83
7.3.10.0060.01016.80
7.3.00.0030.01016.70
7.2.330.0110.00616.80
7.2.320.0120.00616.39
7.2.310.0040.01516.73
7.2.300.0130.00716.66
7.2.290.0070.01416.66
7.2.260.0030.01615.00
7.2.250.0130.00315.13
7.2.240.0030.01315.25
7.2.230.0000.01215.02
7.2.220.0060.01014.97
7.2.210.0090.00615.28
7.2.200.0030.01014.92
7.2.190.0060.00914.91
7.2.180.0090.00314.92
7.2.170.0110.00715.00
7.2.160.0110.00414.75
7.2.150.0030.01316.87
7.2.140.0070.01016.84
7.2.130.0100.00316.73
7.2.120.0110.00417.04
7.2.110.0000.01316.89
7.2.100.0000.02116.82
7.2.90.0090.00316.81
7.2.80.0070.00716.64
7.2.70.0100.01016.88
7.2.60.0040.01816.80
7.2.50.0110.00416.64
7.2.40.0000.01316.63
7.2.30.0060.00616.89
7.2.20.0120.00316.68
7.2.10.0080.00817.01
7.2.00.0070.00517.96
7.1.330.0090.00615.88
7.1.320.0030.01015.54
7.1.310.0070.00715.57
7.1.300.0000.01315.90
7.1.290.0000.01315.77
7.1.280.0070.00715.72
7.1.270.0030.00915.80
7.1.260.0090.00615.82
7.1.250.0000.01015.84
7.1.240.0000.01415.73
7.1.230.0130.00315.73
7.1.220.0060.01015.87
7.1.210.0030.00615.63
7.1.200.0040.01115.88
7.1.190.0100.00315.79
7.1.180.0060.01015.53
7.1.170.0030.00915.84
7.1.160.0040.00715.77
7.1.150.0030.00615.79
7.1.140.0070.00315.86
7.1.130.0060.00315.71
7.1.120.0060.00315.68
7.1.110.0040.01115.61
7.1.100.0390.01216.25
7.1.90.0100.00015.95
7.1.80.0070.00315.95
7.1.70.0020.00916.35
7.1.60.0070.01217.91
7.1.50.0090.00816.26
7.1.40.0030.01015.97
7.1.30.0000.01315.53
7.1.20.0070.00715.86
7.1.10.0030.01115.82
7.1.00.0080.03819.10
7.0.330.0060.00315.43
7.0.320.0120.00915.59
7.0.310.0060.00615.43
7.0.300.0030.00615.47
7.0.290.0060.00615.41
7.0.280.0060.00615.39
7.0.270.0000.01215.53
7.0.260.0030.00615.44
7.0.250.0060.00615.45
7.0.240.0000.01415.54
7.0.230.0000.01415.46
7.0.220.0100.00315.25
7.0.210.0070.00715.54
7.0.200.0080.00516.10
7.0.190.0030.00915.45
7.0.180.0040.01115.55
7.0.170.0040.00415.39
7.0.160.0000.01115.37
7.0.150.0070.00715.30
7.0.140.0020.04118.61
7.0.130.0070.01115.55
7.0.120.0030.00915.08
7.0.110.0030.00715.50
7.0.100.0100.00315.42
7.0.90.0230.02717.60
7.0.80.0340.04017.68
7.0.70.0280.02817.62
7.0.60.0230.02517.59
7.0.50.0280.04317.84
7.0.40.0050.04716.91
7.0.30.0100.04416.85
7.0.20.0030.04916.73
7.0.10.0080.04116.81
7.0.00.0080.04316.83
5.6.400.0070.00713.81
5.6.390.0000.01214.56
5.6.380.0060.00614.47
5.6.370.0040.01114.40
5.6.360.0000.01414.42
5.6.350.0060.00614.34
5.6.340.0110.00414.58
5.6.330.0090.00614.61
5.6.320.0060.00914.11
5.6.310.0060.00314.15
5.6.300.0000.01314.63
5.6.290.0030.01014.64
5.6.280.0030.04417.59
5.6.270.0090.00614.65
5.6.260.0070.00714.46
5.6.250.0070.00714.57
5.6.240.0100.04017.45
5.6.230.0030.03117.46
5.6.220.0080.03617.32
5.6.210.0030.04217.49
5.6.200.0070.04917.54
5.6.190.0070.04317.68
5.6.180.0050.04717.77
5.6.170.0160.03317.60
5.6.160.0070.02817.66
5.6.150.0060.02517.62
5.6.140.0030.04817.81
5.6.130.0060.03517.64
5.6.120.0070.02817.73
5.6.110.0080.04517.59
5.6.100.0100.04317.59
5.6.90.0080.02617.73
5.6.80.0050.02917.32
5.6.70.0030.04817.42
5.6.60.0000.03117.25
5.6.50.0100.04017.45
5.6.40.0050.04717.29
5.6.30.0100.04317.36
5.6.20.0020.03017.30
5.6.10.0070.04217.32
5.6.00.0070.04217.38
5.5.380.0030.05017.42
5.5.370.0100.04017.17
5.5.360.0040.04217.32
5.5.350.0060.02517.42
5.5.340.0050.04017.83
5.5.330.0090.04217.52
5.5.320.0060.04617.52
5.5.310.0030.05017.60
5.5.300.0130.03617.62
5.5.290.0070.03917.47
5.5.280.0030.04317.68
5.5.270.0090.04117.47
5.5.260.0060.02817.52
5.5.250.0070.02417.44
5.5.240.0060.02517.23
5.5.230.0040.03117.24
5.5.220.0130.02017.31
5.5.210.0060.02617.32
5.5.200.0110.03517.22
5.5.190.0050.04417.18
5.5.180.0080.02817.23
5.5.170.0040.01114.19
5.5.160.0080.04217.25
5.5.150.0060.03217.17
5.5.140.0050.04317.10
5.5.130.0070.04117.29
5.5.120.0070.02817.20
5.5.110.0080.03017.12
5.5.100.0070.04317.21
5.5.90.0060.03517.10
5.5.80.0050.02517.20
5.5.70.0070.04117.28
5.5.60.0020.02816.99
5.5.50.0120.02017.25
5.5.40.0100.03017.04
5.5.30.0070.02717.16
5.5.20.0110.04117.14
5.5.10.0070.03417.25
5.5.00.0070.03717.00
5.4.450.0050.03615.18
5.4.440.0120.03315.17
5.4.430.0080.04315.18
5.4.420.0080.04015.24
5.4.410.0100.03815.28
5.4.400.0050.02615.10
5.4.390.0090.02314.92
5.4.380.0030.02815.13
5.4.370.0150.03214.95
5.4.360.0080.03815.01
5.4.350.0110.03815.07
5.4.340.0060.02815.05
5.4.330.0000.00811.18
5.4.320.0070.04315.13
5.4.310.0030.04515.03
5.4.300.0050.02614.99
5.4.290.0070.02514.97
5.4.280.0040.04415.19
5.4.270.0030.04415.02
5.4.260.0040.04114.96
5.4.250.0050.04115.18
5.4.240.0040.03114.81
5.4.230.0090.02314.97
5.4.220.0050.03115.09
5.4.210.0050.02515.00
5.4.200.0100.02715.09
5.4.190.0050.04315.14
5.4.180.0080.02515.00
5.4.170.0060.02914.81
5.4.160.0040.04114.93
5.4.150.0100.03414.95
5.4.140.0060.03813.79
5.4.130.0050.04113.72
5.4.120.0090.02213.71
5.4.110.0100.03313.70
5.4.100.0110.03513.70
5.4.90.0060.03513.92
5.4.80.0070.03513.73
5.4.70.0090.03813.74
5.4.60.0090.03313.62
5.4.50.0020.02913.66
5.4.40.0030.02813.70
5.4.30.0050.04113.62
5.4.20.0050.03913.65
5.4.10.0030.04113.73
5.4.00.0000.04413.43
5.3.290.0150.03112.78
5.3.280.0030.04612.71
5.3.270.0060.04212.66
5.3.260.0050.04012.68
5.3.250.0070.04312.63
5.3.240.0120.02012.68
5.3.230.0070.03512.65
5.3.220.0030.02712.67
5.3.210.0050.04512.59
5.3.200.0080.03612.65
5.3.190.0090.03612.66
5.3.180.0070.03612.69
5.3.170.0050.03512.64
5.3.160.0100.03812.68
5.3.150.0010.04412.64
5.3.140.0090.02512.69
5.3.130.0050.02712.63
5.3.120.0050.02012.67
5.3.110.0100.03712.59
5.3.100.0030.04312.38
5.3.90.0050.04212.43
5.3.80.0100.03712.39
5.3.70.0070.03712.31
5.3.60.0080.04112.40
5.3.50.0120.03112.31
5.3.40.0020.04412.29
5.3.30.0060.03612.35
5.3.20.0030.02812.23
5.3.10.0030.03112.18
5.3.00.0070.02612.16
5.2.170.0070.06311.21
5.2.160.0070.05311.24
5.2.150.0030.06011.09
5.2.140.0000.06711.04
5.2.130.0070.05711.03
5.2.120.0030.06311.20
5.2.110.0100.05711.07
5.2.100.0070.04011.14
5.2.90.0030.03711.25
5.2.80.0030.05711.02
5.2.70.0030.05011.03
5.2.60.0100.06011.07
5.2.50.0030.03311.08
5.2.40.0170.04010.95
5.2.30.0000.05711.11
5.2.20.0030.06710.98
5.2.10.0070.05010.75
5.2.00.0130.05310.77
5.1.60.0100.03710.13
5.1.50.0070.03710.02
5.1.40.0030.04310.07
5.1.30.0030.03710.38
5.1.20.0070.05710.41
5.1.10.0030.05010.00
5.1.00.0030.0439.96
5.0.50.0130.0308.73
5.0.40.0070.0308.50
5.0.30.0030.0638.37
5.0.20.0000.0278.27
5.0.10.0000.0378.30
5.0.00.0030.0338.07
4.4.90.0000.0306.96
4.4.80.0000.0276.96
4.4.70.0000.0336.96
4.4.60.0000.0376.96
4.4.50.0030.0336.96
4.4.40.0100.0476.96
4.4.30.0000.0376.96
4.4.20.0000.0306.96
4.4.10.0000.0376.96
4.4.00.0030.0536.96
4.3.110.0070.0276.96
4.3.100.0030.0236.96
4.3.90.0030.0336.96
4.3.80.0000.0306.96
4.3.70.0030.0306.96
4.3.60.0070.0206.96
4.3.50.0070.0306.96
4.3.40.0070.0336.96
4.3.30.0000.0376.96
4.3.20.0030.0306.96
4.3.10.0030.0336.96
4.3.00.0030.0336.96

preferences:
44.23 ms | 401 KiB | 5 Q