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)
8.3.60.0110.01116.63
8.3.50.0090.00918.30
8.3.40.0070.00718.79
8.3.30.0100.00719.27
8.3.20.0050.00320.38
8.3.10.0040.00423.48
8.3.00.0040.00422.57
8.2.180.0130.00316.63
8.2.170.0110.00422.96
8.2.160.0100.00321.98
8.2.150.0080.00024.18
8.2.140.0000.00924.66
8.2.130.0000.00726.16
8.2.120.0000.00722.26
8.2.110.0030.00619.39
8.2.100.0080.00417.72
8.2.90.0000.00820.55
8.2.80.0040.00417.97
8.2.70.0030.00617.80
8.2.60.0050.00317.93
8.2.50.0080.00018.10
8.2.40.0000.00820.59
8.2.30.0080.00018.10
8.2.20.0040.00417.66
8.2.10.0060.00317.60
8.2.00.0000.00817.60
8.1.270.0040.00423.95
8.1.260.0050.00326.35
8.1.250.0040.00428.09
8.1.240.0040.00822.46
8.1.230.0090.00321.05
8.1.220.0040.00417.74
8.1.210.0050.00319.09
8.1.200.0060.00317.35
8.1.190.0040.00417.23
8.1.180.0030.00518.10
8.1.170.0050.00318.54
8.1.160.0040.00422.07
8.1.150.0020.00518.53
8.1.140.0050.00317.49
8.1.130.0070.00017.93
8.1.120.0000.00717.55
8.1.110.0000.00817.50
8.1.100.0000.00717.38
8.1.90.0080.00017.48
8.1.80.0030.00317.40
8.1.70.0000.00717.41
8.1.60.0030.00717.67
8.1.50.0000.00817.56
8.1.40.0000.00817.63
8.1.30.0080.00017.56
8.1.20.0000.00817.59
8.1.10.0070.00017.50
8.1.00.0000.00717.42
8.0.300.0040.00420.16
8.0.290.0040.00416.88
8.0.280.0000.00718.48
8.0.270.0020.00417.16
8.0.260.0000.00716.87
8.0.250.0000.00716.89
8.0.240.0030.00317.00
8.0.230.0040.00416.89
8.0.220.0030.00317.00
8.0.210.0040.00416.93
8.0.200.0040.00416.85
8.0.190.0030.00616.87
8.0.180.0050.00316.96
8.0.170.0000.00816.99
8.0.160.0000.00816.95
8.0.150.0040.00416.77
8.0.140.0030.00516.79
8.0.130.0030.00313.31
8.0.120.0020.00516.73
8.0.110.0040.00416.96
8.0.100.0050.00216.76
8.0.90.0000.00716.98
8.0.80.0000.01516.85
8.0.70.0000.00716.97
8.0.60.0030.00516.89
8.0.50.0040.00417.00
8.0.30.0150.00817.15
8.0.20.0160.00517.40
8.0.10.0000.00816.96
8.0.00.0120.01016.75
7.4.330.0000.00515.03
7.4.320.0070.00016.52
7.4.300.0000.00616.44
7.4.290.0050.00216.45
7.4.280.0030.00316.52
7.4.270.0000.00816.49
7.4.260.0000.00716.54
7.4.250.0040.00416.44
7.4.240.0050.00216.54
7.4.230.0000.00716.54
7.4.220.0100.00716.45
7.4.210.0070.00916.46
7.4.200.0030.00316.39
7.4.190.0040.00416.43
7.4.160.0100.00716.64
7.4.150.0070.01017.40
7.4.140.0120.00817.86
7.4.130.0110.01116.58
7.4.120.0070.01116.52
7.4.110.0120.00416.50
7.4.100.0060.01216.61
7.4.90.0100.00716.52
7.4.80.0140.00316.52
7.4.70.0040.01216.41
7.4.60.0040.01216.43
7.4.50.0060.00316.60
7.4.40.0070.01122.77
7.4.30.0080.00816.64
7.4.00.0070.00715.05
7.3.330.0000.00613.32
7.3.320.0050.00013.16
7.3.310.0030.00316.34
7.3.300.0070.00016.36
7.3.290.0070.00716.33
7.3.280.0090.00816.33
7.3.270.0090.00917.40
7.3.260.0030.01516.29
7.3.250.0110.00916.45
7.3.240.0040.01316.70
7.3.230.0070.01016.44
7.3.210.0070.01316.42
7.3.200.0160.00619.39
7.3.190.0150.00316.39
7.3.180.0090.01116.16
7.3.170.0060.01016.60
7.3.160.0100.00716.36
7.3.120.0120.00314.96
7.2.330.0100.01016.52
7.2.320.0030.01416.83
7.2.310.0030.01516.76
7.2.300.0140.00316.40
7.2.290.0110.01216.87
7.2.60.0060.00916.82
7.2.00.0030.01019.43
7.1.200.0000.01015.96
7.1.100.0060.00618.19
7.1.70.0000.01017.29
7.1.60.0150.01119.29
7.1.50.0060.01317.02
7.1.00.0000.07722.36
7.0.200.0070.01116.77
7.0.140.0030.06722.16
7.0.90.0070.08019.96
7.0.80.0130.08020.02
7.0.70.0100.05019.89
7.0.60.0030.09319.97
7.0.50.0100.07020.30
7.0.40.0070.07020.13
7.0.30.0130.07320.17
7.0.20.0130.04020.18
7.0.10.0030.06719.99
7.0.00.0070.04020.07
5.6.280.0030.07321.15
5.6.240.0070.08020.72
5.6.230.0130.08020.71
5.6.220.0130.08020.63
5.6.210.0130.07720.64
5.6.200.0000.05020.96
5.6.190.0100.05321.13
5.6.180.0100.08021.05
5.6.170.0100.07321.10
5.6.160.0030.05021.20
5.6.150.0070.04021.03
5.6.140.0030.04321.13
5.6.130.0100.03721.10
5.6.120.0070.05320.97
5.6.110.0070.04020.96
5.6.100.0070.03320.96
5.6.90.0030.09021.03
5.6.80.0000.06020.45
5.6.70.0070.03720.43
5.6.60.0070.06020.45
5.6.50.0030.04020.49
5.6.40.0000.03720.31
5.6.30.0030.04020.49
5.6.20.0100.03320.48
5.6.10.0000.03720.41
5.6.00.0070.05320.37
5.5.380.0100.07720.41
5.5.370.0070.08320.44
5.5.360.0000.05020.38
5.5.350.0070.05020.39
5.5.340.0070.05020.91
5.5.330.0130.07320.95
5.5.320.0030.08020.79
5.5.310.0070.07720.66
5.5.300.0100.03320.89
5.5.290.0070.04720.85
5.5.280.0000.04320.66
5.5.270.0030.04320.84
5.5.260.0170.06720.93
5.5.250.0070.03720.60
5.5.240.0000.06020.03
5.5.230.0000.04320.04
5.5.220.0070.03720.18
5.5.210.0130.02720.17
5.5.200.0000.05020.29
5.5.190.0000.04320.11
5.5.180.0000.06020.24
5.5.160.0000.03720.23
5.5.150.0170.05320.25
5.5.140.0070.03720.16
5.5.130.0030.04019.99
5.5.120.0100.03320.25
5.5.110.0030.04020.25
5.5.100.0000.04320.10
5.5.90.0000.04720.06
5.5.80.0000.06720.06
5.5.70.0000.04020.02
5.5.60.0070.05020.12
5.5.50.0130.02720.14
5.5.40.0030.03719.97
5.5.30.0030.03720.05
5.5.20.0070.03320.18
5.5.10.0100.03020.02
5.5.00.0030.05320.05
5.4.450.0000.04319.50
5.4.440.0070.03319.45
5.4.430.0070.06719.48
5.4.420.0070.08319.48
5.4.410.0030.08319.24
5.4.400.0030.04719.25
5.4.390.0030.03719.16
5.4.380.0000.06318.93
5.4.370.0000.04018.89
5.4.360.0070.07319.12
5.4.350.0030.03718.87
5.4.340.0030.04318.84
5.4.320.0100.06019.13
5.4.310.0000.04719.02
5.4.300.0030.04719.03
5.4.290.0030.03319.03
5.4.280.0070.03319.22
5.4.270.0070.06719.13
5.4.260.0030.03318.98
5.4.250.0030.04018.87
5.4.240.0030.04019.20
5.4.230.0070.03718.87
5.4.220.0000.04019.09
5.4.210.0030.03719.22
5.4.200.0000.03718.93
5.4.190.0100.02719.10
5.4.180.0070.03319.08
5.4.170.0030.03719.20
5.4.160.0070.05719.14
5.4.150.0100.06718.91
5.4.140.0030.06316.50
5.4.130.0070.07016.46
5.4.120.0130.06316.43
5.4.110.0000.08016.56
5.4.100.0000.07316.55
5.4.90.0070.05016.46
5.4.80.0070.06716.49
5.4.70.0030.04316.38
5.4.60.0100.06316.34
5.4.50.0100.06316.27
5.4.40.0030.07716.49
5.4.30.0070.07016.30
5.4.20.0130.05316.40
5.4.10.0100.06316.25
5.4.00.0070.03715.82
5.3.290.0030.03314.76
5.3.280.0030.04014.74
5.3.270.0000.04014.63
5.3.260.0030.06714.61
5.3.250.0070.05714.65
5.3.240.0030.08014.60
5.3.230.0070.07314.68
5.3.220.0030.08014.58
5.3.210.0000.06714.60
5.3.200.0100.06314.73
5.3.190.0130.06714.62
5.3.180.0070.07314.70
5.3.170.0070.06014.62
5.3.160.0100.03714.63
5.3.150.0030.04314.58
5.3.140.0100.07014.67
5.3.130.0070.07314.60
5.3.120.0030.08014.64
5.3.110.0170.07014.63
5.3.100.0000.07714.01
5.3.90.0100.07314.07
5.3.80.0170.06714.15
5.3.70.0030.05314.16
5.3.60.0030.07713.96
5.3.50.0070.04714.05
5.3.40.0000.07713.97
5.3.30.0100.07314.06
5.3.20.0000.06713.84
5.3.10.0130.06313.61
5.3.00.0130.06313.57
5.2.170.0070.04011.24
5.2.160.0030.06011.11
5.2.150.0030.03711.09
5.2.140.0030.06711.06
5.2.130.0070.04011.24
5.2.120.0100.05311.20
5.2.110.0100.04311.06
5.2.100.0100.04011.15
5.2.90.0100.05711.07
5.2.80.0030.06711.16
5.2.70.0100.05011.21
5.2.60.0030.06010.97
5.2.50.0030.06311.05
5.2.40.0070.06011.05
5.2.30.0070.06010.87
5.2.20.0130.04710.94
5.2.10.0070.05710.84
5.2.00.0070.06010.72
5.1.60.0000.0579.91
5.1.50.0100.05010.13
5.1.40.0030.04710.13
5.1.30.0000.05010.30
5.1.20.0130.02710.33
5.1.10.0100.02310.11
5.1.00.0070.05010.00
5.0.50.0030.0378.62
5.0.40.0070.0208.57
5.0.30.0070.0578.37
5.0.20.0030.0338.31
5.0.10.0030.0378.22
5.0.00.0000.0638.31
4.4.90.0030.0337.34
4.4.80.0030.0307.34
4.4.70.0000.0407.34
4.4.60.0030.0337.34
4.4.50.0070.0337.34
4.4.40.0000.0537.34
4.4.30.0070.0337.34
4.4.20.0070.0207.34
4.4.10.0030.0337.34
4.4.00.0000.0377.34
4.3.110.0000.0307.34
4.3.100.0030.0307.34
4.3.90.0000.0337.34
4.3.80.0030.0377.34
4.3.70.0030.0307.34
4.3.60.0030.0337.34
4.3.50.0000.0307.34
4.3.40.0100.0437.34
4.3.30.0000.0377.34
4.3.20.0070.0307.34
4.3.10.0000.0377.34
4.3.00.0030.0337.34

preferences:
43.99 ms | 400 KiB | 5 Q