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'; } } } $var = array( 0 => array('text', 1, 1.1, true, false, null, array(), new stdClass, @fopen('php://stdin', 'r')), 2 => array('a' => 'hoge', 'b' => 'foo'), ); echo @json_encode($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)
8.3.70.0060.00916.58
8.3.60.0150.00718.38
8.3.50.0100.01121.93
8.3.40.0090.00618.68
8.3.30.0060.00918.67
8.3.20.0070.00718.74
8.3.10.0040.00421.17
8.3.00.0000.00721.93
8.2.180.0090.00618.66
8.2.170.0110.00422.96
8.2.160.0100.00320.46
8.2.150.0000.00824.18
8.2.140.0050.00324.66
8.2.130.0080.00026.16
8.2.120.0000.00821.06
8.2.110.0060.00620.25
8.2.100.0060.00617.91
8.2.90.0050.00319.26
8.2.80.0000.00818.04
8.2.70.0000.01017.50
8.2.60.0000.00818.04
8.2.50.0000.00818.07
8.2.40.0040.00418.14
8.2.30.0080.00019.80
8.2.20.0040.00417.86
8.2.10.0000.00817.92
8.2.00.0000.00817.70
8.1.280.0090.00925.92
8.1.270.0040.00423.99
8.1.260.0070.00026.35
8.1.250.0000.00728.09
8.1.240.0090.00022.59
8.1.230.0080.00420.85
8.1.220.0040.00418.77
8.1.210.0030.00618.85
8.1.200.0030.00617.35
8.1.190.0030.00517.54
8.1.180.0000.00818.10
8.1.170.0040.00718.58
8.1.160.0050.00218.86
8.1.150.0000.00818.74
8.1.140.0050.00317.50
8.1.130.0000.00717.94
8.1.120.0070.00017.49
8.1.110.0050.00317.41
8.1.100.0000.00717.46
8.1.90.0040.00417.53
8.1.80.0000.00717.39
8.1.70.0030.00317.51
8.1.60.0030.00517.57
8.1.50.0040.00417.52
8.1.40.0050.00317.53
8.1.30.0040.00417.70
8.1.20.0030.00617.70
8.1.10.0000.00717.61
8.1.00.0030.00517.61
8.0.300.0080.00020.02
8.0.290.0070.00017.30
8.0.280.0070.00018.55
8.0.270.0040.00417.28
8.0.260.0090.00016.84
8.0.250.0040.00417.05
8.0.240.0000.00817.10
8.0.230.0040.00417.04
8.0.220.0000.00716.91
8.0.210.0000.00716.96
8.0.200.0080.00016.93
8.0.190.0050.00317.07
8.0.180.0040.00417.07
8.0.170.0060.00316.89
8.0.160.0000.00716.89
8.0.150.0050.00316.96
8.0.140.0100.00016.97
8.0.130.0030.00313.51
8.0.120.0050.00316.95
8.0.110.0000.00716.91
8.0.100.0000.00717.06
8.0.90.0040.00416.92
8.0.80.0040.01116.97
8.0.70.0000.00816.95
8.0.60.0050.00317.00
8.0.50.0040.00416.90
8.0.30.0110.01117.02
8.0.20.0160.00317.40
8.0.10.0000.00717.04
8.0.00.0120.00816.93
7.4.330.0000.00514.79
7.4.320.0030.00616.69
7.4.300.0000.00716.54
7.4.290.0000.00716.52
7.4.280.0030.00516.59
7.4.270.0030.00316.60
7.4.260.0030.00313.32
7.4.250.0000.00716.61
7.4.240.0070.00016.65
7.4.230.0030.00316.46
7.4.220.0130.00416.69
7.4.210.0060.01016.62
7.4.200.0000.00816.52
7.4.190.0030.00316.51
7.4.160.0120.00316.79
7.4.150.0130.01017.40
7.4.140.0100.01017.86
7.4.130.0090.00916.50
7.4.120.0070.01216.65
7.4.110.0090.01216.47
7.4.100.0070.01016.52
7.4.90.0130.00316.52
7.4.80.0030.01316.52
7.4.70.0120.00416.38
7.4.60.0080.00816.64
7.4.50.0040.00416.38
7.4.40.0080.00822.52
7.4.30.0060.01016.63
7.4.00.0070.00914.89
7.3.330.0000.00613.34
7.3.320.0000.00613.34
7.3.310.0030.00316.39
7.3.300.0000.00716.32
7.3.290.0070.00716.30
7.3.280.0060.00916.37
7.3.270.0100.00717.40
7.3.260.0100.00818.24
7.3.250.0080.01016.39
7.3.240.0100.01016.28
7.3.230.0150.00916.54
7.3.210.0190.00016.56
7.3.200.0170.00719.39
7.3.190.0030.01416.64
7.3.180.0100.00716.53
7.3.170.0140.00316.42
7.3.160.0030.01316.21
7.3.120.0110.00614.96
7.3.110.0040.01414.73
7.3.100.0110.00414.57
7.3.90.0090.00615.03
7.3.80.0040.00414.80
7.3.70.0080.00614.85
7.3.60.0030.00914.64
7.3.50.0040.00814.86
7.3.40.0060.00614.83
7.3.30.0000.01114.96
7.3.20.0030.00916.58
7.3.10.0040.01116.58
7.3.00.0110.00316.82
7.2.330.0100.00716.59
7.2.320.0130.01016.64
7.2.310.0090.01316.70
7.2.300.0130.00316.74
7.2.290.0060.01216.69
7.2.250.0110.00714.81
7.2.240.0130.00715.13
7.2.230.0070.00715.17
7.2.220.0030.01214.84
7.2.210.0090.00914.94
7.2.200.0060.00315.02
7.2.190.0070.00715.27
7.2.180.0060.00914.96
7.2.170.0070.00714.83
7.2.00.0060.01219.22
7.1.330.0040.01215.82
7.1.320.0040.00815.95
7.1.310.0060.00815.82
7.1.300.0100.00015.57
7.1.290.0000.01315.83
7.1.280.0000.00915.94
7.1.270.0060.00915.50
7.1.260.0070.00715.47
7.1.100.0000.01117.85
7.1.70.0080.00317.06
7.1.60.0090.00919.40
7.1.50.0070.01416.56
7.1.00.0000.05022.41
7.0.200.0000.00716.63
7.0.140.0070.06721.96
7.0.90.0800.07320.00
7.0.80.0700.07019.95
7.0.70.0570.08020.08
7.0.60.0500.03720.05
7.0.50.0630.07720.34
7.0.40.0170.05320.08
7.0.30.0170.07020.04
7.0.20.0200.07320.09
7.0.10.0170.07020.18
7.0.00.0130.07720.02
5.6.280.0030.07321.08
5.6.240.0100.04720.65
5.6.230.0130.08020.77
5.6.220.0130.07320.72
5.6.210.0000.05020.66
5.6.200.0200.05721.13
5.6.190.0000.06720.96
5.6.180.0130.06021.07
5.6.170.0100.08321.05
5.6.160.0100.04021.06
5.6.150.0100.06021.03
5.6.140.0070.04721.04
5.6.130.0130.08020.95
5.6.120.0030.07721.03
5.6.110.0200.07321.14
5.6.100.0070.08021.12
5.6.90.0130.08020.93
5.6.80.0130.07320.48
5.6.70.0030.06320.36
5.6.60.0070.04320.42
5.6.50.0030.04020.43
5.6.40.0100.05320.39
5.6.30.0070.04020.34
5.6.20.0070.06320.39
5.6.10.0170.05720.50
5.6.00.0070.07720.43
5.5.380.0070.07320.41
5.5.370.0100.04320.37
5.5.360.0130.04320.34
5.5.350.0070.04020.44
5.5.340.0030.04320.88
5.5.330.0070.07020.89
5.5.320.0130.07720.89
5.5.310.0130.06020.76
5.5.300.0100.06320.93
5.5.290.0000.08020.90
5.5.280.0030.05020.79
5.5.270.0130.07320.83
5.5.260.0130.04320.77
5.5.250.0000.09020.73
5.5.240.0170.03720.28
5.5.230.0100.03720.20
5.5.220.0030.06720.27
5.5.210.0100.05720.20
5.5.200.0030.05720.26
5.5.190.0100.04020.24
5.5.180.0070.04320.25
5.5.160.0070.07020.17
5.5.150.0030.08020.26
5.5.140.0100.07720.22
5.5.130.0070.07720.25
5.5.120.0070.03720.17
5.5.110.0070.08020.16
5.5.100.0030.08720.18
5.5.90.0070.07320.06
5.5.80.0030.05319.96
5.5.70.0070.04320.14
5.5.60.0170.06020.10
5.5.50.0130.06720.15
5.5.40.0130.06719.95
5.5.30.0100.05319.95
5.5.20.0100.05320.04
5.5.10.0030.05020.03
5.5.00.0130.04320.13
5.4.450.0100.07319.49
5.4.440.0030.04719.48
5.4.430.0070.08019.18
5.4.420.0100.04019.37
5.4.410.0000.04719.22
5.4.400.0030.05319.21
5.4.390.0100.06718.94
5.4.380.0030.04319.12
5.4.370.0100.05719.14
5.4.360.0100.04019.09
5.4.350.0030.05719.10
5.4.340.0030.04018.95
5.4.320.0070.08019.13
5.4.310.0030.04018.90
5.4.300.0130.07319.18
5.4.290.0000.05019.12
5.4.280.0030.04718.90
5.4.270.0100.07719.09
5.4.260.0030.08319.03
5.4.250.0070.08018.84
5.4.240.0030.04718.84
5.4.230.0030.04019.03
5.4.220.0170.06719.12
5.4.210.0100.06019.04
5.4.200.0100.04719.02
5.4.190.0070.07719.04
5.4.180.0000.04719.04
5.4.170.0100.06719.02
5.4.160.0170.06018.93
5.4.150.0170.04719.02
5.4.140.0100.04016.46
5.4.130.0070.07716.45
5.4.120.0000.08016.41
5.4.110.0130.06316.46
5.4.100.0130.06716.56
5.4.90.0030.07316.41
5.4.80.0130.06716.36
5.4.70.0070.03716.46
5.4.60.0030.07716.45
5.4.50.0030.04016.36
5.4.40.0030.07716.49
5.4.30.0100.07016.44
5.4.20.0100.04016.27
5.4.10.0000.05716.42
5.4.00.0130.06315.85
5.3.290.0030.04314.61
5.3.280.0030.04314.60
5.3.270.0070.07014.77
5.3.260.0070.05014.57
5.3.250.0130.06714.74
5.3.240.0170.06314.62
5.3.230.0100.05714.64
5.3.220.0070.08014.65
5.3.210.0030.04714.65
5.3.200.0070.06014.60
5.3.190.0130.06714.62
5.3.180.0100.07014.59
5.3.170.0000.05314.72
5.3.160.0100.07314.61
5.3.150.0100.04314.58
5.3.140.0130.06714.56
5.3.130.0070.07714.70
5.3.120.0030.08314.52
5.3.110.0100.07014.70
5.3.100.0100.04714.01
5.3.90.0070.07314.07
5.3.80.0000.08014.15
5.3.70.0030.06314.18
5.3.60.0170.06314.00
5.3.50.0170.05713.91
5.3.40.0070.04714.03
5.3.30.0030.07713.98
5.3.20.0130.06313.71
5.3.10.0000.06013.66
5.3.00.0070.04713.59
5.2.170.0100.06011.62
5.2.160.0030.06311.62
5.2.150.0030.05711.62
5.2.140.0030.05011.62
5.2.130.0100.04711.62
5.2.120.0100.03011.62
5.2.110.0070.03011.62
5.2.100.0000.06711.62
5.2.90.0070.05711.62
5.2.80.0030.04311.62
5.2.70.0030.04011.62
5.2.60.0130.05011.62
5.2.50.0030.05311.62
5.2.40.0030.06311.62
5.2.30.0030.06011.62
5.2.20.0030.06311.62
5.2.10.0070.05711.62
5.2.00.0100.05711.62
5.1.60.0100.04311.62
5.1.50.0000.03711.62
5.1.40.0030.04711.62
5.1.30.0030.05711.62
5.1.20.0030.03711.62
5.1.10.0000.04711.62
5.1.00.0030.05711.62
5.0.50.0000.03711.62
5.0.40.0030.03711.62
5.0.30.0070.05711.62
5.0.20.0000.05011.62
5.0.10.0000.02311.62
5.0.00.0030.06011.62
4.4.90.0000.03711.62
4.4.80.0030.03311.62
4.4.70.0030.02311.62
4.4.60.0000.03711.62
4.4.50.0070.02311.62
4.4.40.0030.05011.62
4.4.30.0000.03711.62
4.4.20.0030.03711.62
4.4.10.0000.03711.62
4.4.00.0030.05011.62
4.3.110.0030.03311.62
4.3.100.0030.03011.62
4.3.90.0030.02311.62
4.3.80.0000.04011.62
4.3.70.0000.03711.62
4.3.60.0030.03311.62
4.3.50.0030.02711.62
4.3.40.0070.04711.62
4.3.30.0000.03711.62
4.3.20.0030.03011.62
4.3.10.0030.03011.62
4.3.00.0000.03711.62

preferences:
50.75 ms | 401 KiB | 5 Q