3v4l.org

run code in 300+ PHP versions simultaneously
<?php if (!function_exists('json_encode')) { function json_encode($it) { $tmp = $it; if (!($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); $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 $value === null: case is_resource($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\\\"/"); } } } $var = array( array( 'text', 1, 1.1, true, false, null, array(), new stdClass, fopen('php://stdin', 'r'), ), array( '&\'/"' => "\r\n\t", ), array( '0' => 'hoge', '1' => 'foo', ), (object)array( '0' => 'hoge', '1' => 'foo', ), array( '0' => 'hoge', '2' => 'foo', ), (object)array( '0' => 'hoge', '2' => 'foo', ), ); var_dump(@json_encode($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)
8.3.60.0040.01118.33
8.3.50.0140.00621.21
8.3.40.0180.00418.80
8.3.30.0070.00718.67
8.3.20.0060.00318.91
8.3.10.0080.00020.56
8.3.00.0040.00419.38
8.2.180.0140.00416.75
8.2.170.0090.00622.96
8.2.160.0070.00722.30
8.2.150.0040.00424.18
8.2.140.0050.00324.66
8.2.130.0040.00426.16
8.2.120.0040.00419.35
8.2.110.0070.00321.06
8.2.100.0040.00717.84
8.2.90.0000.00819.21
8.2.80.0050.00317.97
8.2.70.0080.00017.60
8.2.60.0000.00817.93
8.2.50.0030.00618.07
8.2.40.0050.00318.16
8.2.30.0050.00319.90
8.2.20.0040.00417.88
8.2.10.0000.00817.89
8.2.00.0050.00317.68
8.1.280.0120.00925.92
8.1.270.0040.00423.99
8.1.260.0030.00626.35
8.1.250.0040.00428.09
8.1.240.0110.00020.81
8.1.230.0070.00721.17
8.1.220.0050.00318.77
8.1.210.0050.00319.02
8.1.200.0000.00917.47
8.1.190.0090.00017.66
8.1.180.0040.00418.10
8.1.170.0000.00818.85
8.1.160.0060.00319.00
8.1.150.0040.00418.71
8.1.140.0080.00017.55
8.1.130.0030.00317.93
8.1.120.0000.00817.41
8.1.110.0040.00417.48
8.1.100.0000.00717.53
8.1.90.0040.00417.49
8.1.80.0020.00517.47
8.1.70.0040.00417.48
8.1.60.0000.00917.68
8.1.50.0040.00417.53
8.1.40.0040.00417.57
8.1.30.0000.00717.70
8.1.20.0000.00917.74
8.1.10.0040.00417.50
8.1.00.0030.00617.55
8.0.300.0090.00020.13
8.0.290.0000.00717.00
8.0.280.0070.00018.57
8.0.270.0070.00017.43
8.0.260.0000.00816.96
8.0.250.0040.00417.11
8.0.240.0030.00517.05
8.0.230.0040.00417.04
8.0.220.0070.00017.04
8.0.210.0000.00717.02
8.0.200.0000.00717.03
8.0.190.0050.00217.11
8.0.180.0110.00316.99
8.0.170.0060.00317.16
8.0.160.0000.00717.09
8.0.150.0030.00617.04
8.0.140.0070.00416.96
8.0.130.0030.00313.52
8.0.120.0000.00817.03
8.0.110.0030.00616.86
8.0.100.0040.00417.12
8.0.90.0040.00417.04
8.0.80.0030.01217.10
8.0.70.0000.00817.14
8.0.60.0050.00216.97
8.0.50.0040.00417.06
8.0.30.0070.01217.21
8.0.20.0110.01217.40
8.0.10.0070.00017.17
8.0.00.0080.01216.86
7.4.330.0020.00213.43
7.4.320.0060.00016.62
7.4.300.0000.00816.67
7.4.290.0000.00716.61
7.4.280.0000.00716.65
7.4.270.0030.00316.48
7.4.260.0030.00313.27
7.4.250.0040.00416.62
7.4.240.0000.00816.68
7.4.230.0070.00016.72
7.4.220.0070.01116.57
7.4.210.0070.00816.66
7.4.200.0000.00716.49
7.4.190.0000.00716.73
7.4.160.0030.01216.75
7.4.150.0130.00717.40
7.4.140.0100.00817.18
7.4.130.0120.00716.54
7.4.120.0080.01016.45
7.4.110.0110.00716.25
7.4.100.0120.00916.70
7.4.90.0060.01516.40
7.4.80.0100.00719.03
7.4.70.0150.00416.45
7.4.60.0030.01316.68
7.4.50.0050.00316.55
7.4.40.0110.00722.27
7.4.30.0080.00816.50
7.4.00.0000.00914.80
7.3.330.0050.00013.41
7.3.320.0050.00013.39
7.3.310.0030.00316.44
7.3.300.0030.00316.33
7.3.290.0070.01416.36
7.3.280.0060.01116.41
7.3.270.0040.01217.40
7.3.260.0120.00718.24
7.3.250.0120.01216.50
7.3.240.0070.01016.38
7.3.230.0080.00816.63
7.3.210.0140.00316.31
7.3.200.0070.01019.39
7.3.190.0130.01016.53
7.3.180.0060.00916.34
7.3.170.0000.01716.66
7.3.160.0030.01416.44
7.3.120.0100.00714.89
7.3.10.0140.00816.65
7.3.00.0130.00716.37
7.2.330.0130.00616.68
7.2.320.0080.00816.47
7.2.310.0000.01716.51
7.2.300.0090.01216.61
7.2.290.0120.01216.51
7.2.130.0130.00416.34
7.2.120.0140.00316.71
7.2.110.0080.01216.54
7.2.100.0110.00616.42
7.2.90.0220.00316.50
7.2.80.0110.01316.59
7.2.70.0100.00816.62
7.2.60.0090.01016.64
7.2.50.0160.00516.56
7.2.40.0170.00616.39
7.2.30.0180.00916.59
7.2.20.0140.01116.41
7.2.10.0120.00516.58
7.2.00.0090.01017.62
7.1.250.0130.00715.43
7.1.200.0130.00015.52
7.1.100.0000.01217.96
7.1.70.0000.01216.81
7.1.60.0160.00919.40
7.1.50.0100.01016.89
7.1.00.0030.07322.45
7.0.200.0100.00216.39
7.0.140.0000.07722.01
7.0.90.0130.04321.77
7.0.80.0030.05021.69
7.0.70.0030.04721.74
7.0.60.0070.05321.75
7.0.50.0030.08322.18
7.0.40.0030.07720.03
7.0.30.0100.08020.02
7.0.20.0000.08720.08
7.0.10.0030.08020.09
7.0.00.0100.04320.08
5.6.280.0070.07021.11
5.6.240.0070.06320.65
5.6.230.0030.08020.55
5.6.220.0070.07020.51
5.6.210.0030.05720.79
5.6.200.0070.08720.98
5.6.190.0070.05021.06
5.6.180.0070.07721.04
5.6.170.0000.09021.05
5.6.160.0100.07321.16
5.6.150.0100.06720.97
5.6.140.0130.07021.06
5.6.130.0070.07021.07
5.6.120.0000.05321.18
5.6.110.0000.04720.96
5.6.100.0030.08721.02
5.6.90.0030.05021.08
5.6.80.0100.06720.49
5.6.70.0070.08020.53
5.6.60.0030.05020.32
5.6.50.0100.07020.36
5.6.40.0070.07320.32
5.6.30.0130.04320.40
5.6.20.0000.08320.54
5.6.10.0070.07720.41
5.6.00.0030.06320.41
5.5.380.0000.08320.51
5.5.370.0070.07020.37
5.5.360.0000.07720.43
5.5.350.0000.08020.38
5.5.340.0030.05320.85
5.5.330.0030.08720.85
5.5.320.0070.05020.77
5.5.310.0070.07720.85
5.5.300.0000.07020.85
5.5.290.0070.08320.90
5.5.280.0100.04320.94
5.5.270.0030.07320.92
5.5.260.0030.08320.84
5.5.250.0070.07720.73
5.5.240.0100.06020.26
5.5.230.0070.05020.29
5.5.220.0030.08020.21
5.5.210.0070.05020.28
5.5.200.0170.05720.23
5.5.190.0030.05020.13
5.5.180.0030.05320.29
5.5.160.0000.08020.20
5.5.150.0030.04320.19
5.5.140.0000.08720.20
5.5.130.0100.06720.22
5.5.120.0030.04020.26
5.5.110.0100.05320.13
5.5.100.0000.08020.15
5.5.90.0070.07320.07
5.5.80.0070.07319.96
5.5.70.0100.04320.05
5.5.60.0130.07020.10
5.5.50.0030.07020.11
5.5.40.0070.04320.05
5.5.30.0100.05719.95
5.5.20.0000.07319.90
5.5.10.0030.04719.97
5.5.00.0200.06320.01
5.4.450.0070.08019.36
5.4.440.0100.07319.35
5.4.430.0100.04019.35
5.4.420.0100.07319.37
5.4.410.0030.07319.32
5.4.400.0130.06319.23
5.4.390.0030.04719.05
5.4.380.0030.07019.23
5.4.370.0030.07019.18
5.4.360.0030.05019.14
5.4.350.0100.03719.21
5.4.340.0000.08318.95
5.4.320.0030.06019.16
5.4.310.0100.03318.90
5.4.300.0030.04719.04
5.4.290.0030.04319.09
5.4.280.0030.05719.03
5.4.270.0000.07718.96
5.4.260.0030.07319.16
5.4.250.0000.05718.84
5.4.240.0070.06719.02
5.4.230.0030.06319.17
5.4.220.0030.03719.12
5.4.210.0000.04719.15
5.4.200.0030.04719.20
5.4.190.0030.06718.89
5.4.180.0100.06718.84
5.4.170.0030.07318.94
5.4.160.0000.08019.12
5.4.150.0030.05719.03
5.4.140.0030.06316.44
5.4.130.0030.05716.45
5.4.120.0030.05316.43
5.4.110.0000.04716.44
5.4.100.0130.03016.61
5.4.90.0070.06716.48
5.4.80.0000.07316.52
5.4.70.0000.07316.43
5.4.60.0030.07016.45
5.4.50.0030.04316.48
5.4.40.0030.07016.37
5.4.30.0000.05316.26
5.4.20.0000.04316.32
5.4.10.0000.07716.52
5.4.00.0100.06715.89
5.3.290.0000.04314.75
5.3.280.0030.04314.76
5.3.270.0070.07014.64
5.3.260.0130.07014.77
5.3.250.0000.05014.72
5.3.240.0030.07014.60
5.3.230.0000.07714.65
5.3.220.0000.07714.69
5.3.210.0030.07714.66
5.3.200.0100.06314.71
5.3.190.0000.08014.61
5.3.180.0000.08014.61
5.3.170.0000.06714.58
5.3.160.0030.07014.56
5.3.150.0030.04314.61
5.3.140.0070.07014.72
5.3.130.0030.07314.51
5.3.120.0070.07014.54
5.3.110.0070.07714.56
5.3.100.0070.06714.18
5.3.90.0030.04313.97
5.3.80.0130.03314.13
5.3.70.0000.07014.07
5.3.60.0030.06314.00
5.3.50.0030.03714.09
5.3.40.0000.07714.00
5.3.30.0030.07313.92
5.3.20.0000.05313.64
5.3.10.0000.07013.82
5.3.00.0070.06013.80
5.2.170.0000.03311.11
5.2.160.0000.06711.07
5.2.150.0000.06011.19
5.2.140.0000.05711.30
5.2.130.0000.06011.14
5.2.120.0030.06011.19
5.2.110.0100.04311.23
5.2.100.0000.03311.06
5.2.90.0000.06011.20
5.2.80.0000.06011.21
5.2.70.0030.06011.18
5.2.60.0030.05711.14
5.2.50.0030.05710.97
5.2.40.0030.05311.16
5.2.30.0030.04710.90
5.2.20.0000.04010.97
5.2.10.0030.05710.82
5.2.00.0070.05710.77
5.1.60.0000.05310.11
5.1.50.0030.03710.04
5.1.40.0000.05710.09
5.1.30.0000.05710.29
5.1.20.0000.03710.33
5.1.10.0000.05710.12
5.1.00.0000.05710.10
5.0.50.0070.0308.68
5.0.40.0030.0378.53
5.0.30.0030.0678.27
5.0.20.0030.0278.36
5.0.10.0000.0338.26
5.0.00.0000.0638.32
4.4.90.0000.0237.37
4.4.80.0000.0377.37
4.4.70.0000.0307.37
4.4.60.0030.0337.37
4.4.50.0000.0407.37
4.4.40.0030.0537.37
4.4.30.0070.0307.37
4.4.20.0000.0307.37
4.4.10.0030.0337.37
4.4.00.0000.0577.37
4.3.110.0000.0237.37
4.3.100.0000.0377.37
4.3.90.0000.0337.37
4.3.80.0000.0407.37
4.3.70.0000.0377.37
4.3.60.0000.0307.37
4.3.50.0030.0307.37
4.3.40.0000.0377.37
4.3.30.0030.0307.37
4.3.20.0030.0277.37
4.3.10.0000.0177.37
4.3.00.0030.0307.37

preferences:
50.77 ms | 401 KiB | 5 Q