3v4l.org

run code in 300+ PHP versions simultaneously
<?php if (!function_exists('json_encode')) { function json_encode($it) { if (!is_array($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++; } $data = array(); foreach ($it as $k => $v) { $k = '"'. addcslashes($k, '"\\') . '"'; $v = _js_enc_value($v); $data[] = $assoc ? $key . ':' . $value : $value; } if ($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($value): return '"' . _js_uni_esc($value) . '"'; default: return $value; } } function _js_uni_esc($value) { $pattern = "/\r|(\n)|((?:[^\x09\x0A\x0D\x20-\x7E]{3})+)/"; return preg_replace_callback($pattern, '_js_uni_esc_cb', $value); } function _js_uni_esc_cb($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'; } } } $var = array( 0 => array('text', 1, 1.1, true, false, null, new stdClass, STDIN), 2 => array('a' => 'hoge', 'b' => 'foo'), ); echo @json_encode($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)
8.3.60.0090.01218.43
8.3.50.0150.00618.40
8.3.40.0040.01118.70
8.3.30.0060.00819.16
8.3.20.0050.00320.35
8.3.10.0050.00321.92
8.3.00.0040.00422.32
8.2.180.0180.00016.50
8.2.170.0040.01122.96
8.2.160.0030.01020.94
8.2.150.0050.00324.18
8.2.140.0050.00324.66
8.2.130.0070.00026.16
8.2.120.0040.00417.63
8.2.110.0060.00322.31
8.2.100.0060.00619.57
8.2.90.0060.00319.17
8.2.80.0040.00417.97
8.2.70.0050.00517.63
8.2.60.0000.00817.93
8.2.50.0080.00018.07
8.2.40.0000.00818.28
8.2.30.0050.00518.18
8.2.20.0000.00717.85
8.2.10.0000.00817.94
8.2.00.0000.00717.99
8.1.270.0050.00322.36
8.1.260.0040.00426.35
8.1.250.0070.00028.09
8.1.240.0040.00423.85
8.1.230.0100.00019.03
8.1.220.0000.00917.74
8.1.210.0000.00818.77
8.1.200.0000.01117.25
8.1.190.0060.00317.40
8.1.180.0040.00418.63
8.1.170.0060.00318.73
8.1.160.0040.00422.11
8.1.150.0030.00518.60
8.1.140.0040.00417.44
8.1.130.0030.00317.75
8.1.120.0040.00417.54
8.1.110.0000.00717.54
8.1.100.0040.00417.49
8.1.90.0070.00017.57
8.1.80.0040.00417.49
8.1.70.0040.00417.41
8.1.60.0000.00817.61
8.1.50.0050.00217.63
8.1.40.0040.00417.57
8.1.30.0000.00817.52
8.1.20.0040.00417.67
8.1.10.0030.00517.61
8.1.00.0090.00017.53
8.0.300.0040.00418.77
8.0.290.0060.00317.30
8.0.280.0070.00018.49
8.0.270.0040.00417.22
8.0.260.0000.00616.93
8.0.250.0000.00816.97
8.0.240.0080.00017.07
8.0.230.0060.00317.00
8.0.220.0070.00016.96
8.0.210.0030.00316.85
8.0.200.0030.00316.88
8.0.190.0030.00516.93
8.0.180.0030.00516.86
8.0.170.0040.00416.98
8.0.160.0000.00716.90
8.0.150.0030.00516.94
8.0.140.0000.00816.91
8.0.130.0030.00313.41
8.0.120.0080.00016.80
8.0.110.0040.00416.82
8.0.100.0040.00416.86
8.0.90.0000.00716.96
8.0.80.0130.00316.99
8.0.70.0030.00616.77
8.0.60.0000.00816.85
8.0.50.0080.00016.84
8.0.30.0150.00717.08
8.0.20.0110.00817.40
8.0.10.0080.00016.95
8.0.00.0070.01116.76
7.4.330.0050.00015.10
7.4.320.0030.00316.65
7.4.300.0070.00016.46
7.4.290.0030.00316.64
7.4.280.0000.00716.54
7.4.270.0000.00816.66
7.4.260.0030.00316.64
7.4.250.0080.00016.61
7.4.240.0030.00516.57
7.4.230.0000.00716.75
7.4.220.0110.00616.61
7.4.210.0040.01016.65
7.4.200.0040.00416.46
7.4.190.0030.00316.72
7.4.160.0040.01516.52
7.4.150.0160.00017.40
7.4.140.0090.00817.86
7.4.130.0060.01116.56
7.4.120.0150.00516.55
7.4.110.0120.01216.59
7.4.100.0110.01116.54
7.4.90.0100.01316.57
7.4.80.0090.01119.39
7.4.70.0080.00816.49
7.4.60.0070.01616.49
7.4.50.0050.00316.62
7.4.40.0070.00722.77
7.4.30.0070.01016.57
7.4.10.0070.01116.61
7.4.00.0110.00515.85
7.3.330.0030.00313.29
7.3.320.0050.00013.30
7.3.310.0000.00716.30
7.3.300.0000.00716.21
7.3.290.0060.01216.31
7.3.280.0100.00716.30
7.3.270.0170.00317.40
7.3.260.0070.01016.33
7.3.250.0140.00616.46
7.3.240.0180.00816.52
7.3.230.0100.00716.59
7.3.210.0120.00316.48
7.3.200.0100.01019.39
7.3.190.0070.01016.52
7.3.180.0100.00616.30
7.3.170.0090.01216.46
7.3.160.0140.00316.46
7.3.130.0000.01715.96
7.3.120.0090.00715.62
7.3.110.0030.01215.68
7.3.100.0070.00615.55
7.3.90.0110.00515.65
7.3.80.0060.00915.54
7.3.70.0030.00715.45
7.3.60.0050.00715.55
7.3.50.0050.00915.50
7.3.40.0070.00615.48
7.3.30.0020.00915.50
7.3.20.0060.01117.29
7.3.10.0060.01116.85
7.3.00.0090.00716.85
7.2.330.0030.01616.63
7.2.320.0090.00916.82
7.2.310.0100.01316.59
7.2.300.0100.00616.65
7.2.290.0070.01016.58
7.2.260.0000.01716.68
7.2.250.0000.02116.65
7.2.240.0040.00915.83
7.2.230.0020.01215.65
7.2.220.0040.00915.64
7.2.210.0070.00715.82
7.2.200.0090.00515.66
7.2.190.0050.01215.71
7.2.180.0070.00915.78
7.2.170.0080.00715.65
7.2.160.0070.00715.79
7.2.150.0070.00717.43
7.2.140.0060.00917.39
7.2.130.0080.00917.18
7.2.120.0100.00617.27
7.2.110.0070.00917.08
7.2.100.0060.00617.11
7.2.90.0060.01117.16
7.2.80.0090.01117.29
7.2.70.0090.00817.15
7.2.60.0080.01017.25
7.2.50.0060.01117.33
7.2.40.0110.00717.20
7.2.30.0080.00917.20
7.2.20.0100.01017.16
7.2.10.0160.00417.25
7.2.00.0130.01017.43
7.1.330.0020.01316.51
7.1.320.0080.00616.35
7.1.310.0070.00516.49
7.1.300.0070.00516.53
7.1.290.0070.00416.39
7.1.280.0040.00616.44
7.1.270.0120.00016.36
7.1.260.0070.00816.45
7.1.250.0030.01216.14
7.1.240.0040.01117.09
7.1.230.0070.01017.05
7.1.220.0110.00717.16
7.1.210.0120.00017.10
7.1.200.0030.01317.22
7.1.190.0090.00617.23
7.1.180.0030.00717.19
7.1.170.0030.01017.21
7.1.160.0000.01617.19
7.1.150.0070.01017.34
7.1.140.0110.00417.15
7.1.130.0070.01117.21
7.1.120.0100.00317.27
7.1.110.0030.00917.21
7.1.100.0090.00317.23
7.1.90.0070.00717.29
7.1.80.0000.01517.32
7.1.70.0040.00717.02
7.1.60.0030.01017.27
7.1.50.0180.00825.77
7.1.40.0090.00617.04
7.1.30.0090.00916.91
7.1.20.0070.01116.98
7.1.10.0030.01017.14
7.1.00.0060.04019.84
7.0.330.0050.00616.89
7.0.320.0040.01117.00
7.0.310.0080.00416.81
7.0.300.0000.01116.93
7.0.290.0040.00916.83
7.0.280.0100.00316.96
7.0.270.0140.00416.91
7.0.260.0040.00716.79
7.0.250.0090.00616.80
7.0.240.0000.01016.96
7.0.230.0110.00017.00
7.0.220.0080.00817.05
7.0.210.0070.00317.01
7.0.200.0020.00916.81
7.0.190.0040.00816.99
7.0.180.0100.00316.98
7.0.170.0060.00917.13
7.0.160.0040.00816.87
7.0.150.0070.00716.95
7.0.140.0050.03819.52
7.0.130.0030.01316.70
7.0.120.0030.01016.85
7.0.110.0040.00716.74
7.0.100.0090.00616.93
7.0.90.0050.02718.39
7.0.80.0070.02718.47
7.0.70.0070.02718.41
7.0.60.0030.02418.36
7.0.50.0040.02818.59
7.0.40.0070.02217.49
7.0.30.0090.02217.54
7.0.20.0060.02317.52
7.0.10.0120.03817.50
7.0.00.0070.01917.48
5.6.400.0100.00715.87
5.6.390.0000.01115.75
5.6.380.0040.01215.73
5.6.370.0080.00815.72
5.6.360.0060.01215.60
5.6.350.0040.01415.77
5.6.340.0140.00015.89
5.6.330.0150.00315.84
5.6.320.0030.00916.09
5.6.310.0040.00815.86
5.6.300.0030.00715.92
5.6.290.0080.00815.96
5.6.280.0070.04018.55
5.6.270.0130.00015.93
5.6.260.0070.00715.93
5.6.250.0070.00315.93
5.6.240.0090.02318.18
5.6.230.0020.03218.20
5.6.220.0070.02318.37
5.6.210.0090.02318.27
5.6.200.0060.03618.53
5.6.190.0050.02718.46
5.6.180.0080.02618.42
5.6.170.0070.02418.41
5.6.160.0070.02118.44
5.6.150.0050.02318.36
5.6.140.0020.02718.40
5.6.130.0020.02818.55
5.6.120.0080.02018.38
5.6.110.0090.02218.40
5.6.100.0020.02918.51
5.6.90.0090.01718.47
5.6.80.0020.02718.05
5.6.70.0020.02618.10
5.6.60.0080.02118.02
5.6.50.0140.03718.18
5.6.40.0090.03618.20
5.6.30.0080.03818.10
5.6.20.0120.04118.14
5.6.10.0070.03518.08
5.6.00.0050.03818.13
5.5.380.0080.03918.19
5.5.370.0060.02317.96
5.5.360.0070.02318.17
5.5.350.0070.02618.08
5.5.340.0020.02718.29
5.5.330.0050.02318.28
5.5.320.0030.02318.26
5.5.310.0050.02918.20
5.5.300.0100.03218.24
5.5.290.0050.02218.33
5.5.280.0060.02418.35
5.5.270.0080.02018.19
5.5.260.0050.02218.23
5.5.250.0000.02418.10
5.5.240.0050.02217.96
5.5.230.0060.02117.96
5.5.220.0050.02317.90
5.5.210.0050.02217.94
5.5.200.0030.04717.95
5.5.190.0070.04317.84
5.5.180.0060.04617.98
5.5.170.0040.00815.68
5.5.160.0130.03817.89
5.5.150.0150.03517.87
5.5.140.0080.03717.89
5.5.130.0020.04317.95
5.5.120.0110.03717.81
5.5.110.0020.04017.88
5.5.100.0080.04017.82
5.5.90.0100.04017.92
5.5.80.0020.04017.91
5.5.70.0100.04117.83
5.5.60.0020.04217.83
5.5.50.0080.04317.93
5.5.40.0090.04117.92
5.5.30.0030.04717.87
5.5.20.0030.04617.96
5.5.10.0000.02917.87
5.5.00.0050.04817.92
5.4.450.0030.02315.89
5.4.440.0080.02015.92
5.4.430.0030.03115.99
5.4.420.0070.01716.07
5.4.410.0020.02315.90
5.4.400.0050.02015.88
5.4.390.0020.04115.73
5.4.380.0050.02015.84
5.4.370.0030.03615.60
5.4.360.0050.04115.74
5.4.350.0080.03715.85
5.4.340.0060.04315.68
5.4.330.0050.00312.49
5.4.320.0070.04015.74
5.4.310.0120.03215.62
5.4.300.0100.03715.71
5.4.290.0080.03815.79
5.4.280.0080.03315.75
5.4.270.0090.03815.65
5.4.260.0100.03815.59
5.4.250.0090.02915.84
5.4.240.0070.02415.75
5.4.230.0070.04015.76
5.4.220.0100.03715.80
5.4.210.0050.02915.77
5.4.200.0080.03715.85
5.4.190.0000.03315.54
5.4.180.0050.03815.75
5.4.170.0120.03415.85
5.4.160.0030.02615.74
5.4.150.0100.03315.74
5.4.140.0050.04514.44
5.4.130.0070.03914.44
5.4.120.0060.04014.45
5.4.110.0030.02814.43
5.4.100.0060.04014.55
5.4.90.0050.04114.54
5.4.80.0090.02314.54
5.4.70.0030.03414.51
5.4.60.0060.02314.48
5.4.50.0080.03314.35
5.4.40.0050.03914.52
5.4.30.0070.03014.45
5.4.20.0060.03814.51
5.4.10.0080.03814.42
5.4.00.0060.03614.19
5.3.290.0170.03513.87
5.3.280.0050.04213.71
5.3.270.0070.02813.88
5.3.260.0100.02313.97
5.3.250.0050.02313.85
5.3.240.0030.02913.87
5.3.230.0070.03813.77
5.3.220.0050.04313.78
5.3.210.0030.04513.81
5.3.200.0150.03413.76
5.3.190.0050.03113.95
5.3.180.0070.04213.80
5.3.170.0090.03913.88
5.3.160.0090.02813.87
5.3.150.0030.04513.85
5.3.140.0050.03713.83
5.3.130.0050.04314.03
5.3.120.0100.02913.84
5.3.110.0070.03913.93
5.3.100.0030.02813.59
5.3.90.0090.04013.59
5.3.80.0090.04013.49
5.3.70.0100.02713.59
5.3.60.0050.03713.67
5.3.50.0060.04413.56
5.3.40.0060.04013.48
5.3.30.0100.03713.58
5.3.20.0120.03213.23
5.3.10.0030.03613.36
5.3.00.0020.04713.29
5.2.170.0000.06311.09
5.2.160.0030.06311.09
5.2.150.0070.04711.04
5.2.140.0030.06711.27
5.2.130.0070.05311.18
5.2.120.0030.06311.16
5.2.110.0000.06711.27
5.2.100.0070.03011.02
5.2.90.0130.05011.24
5.2.80.0030.05311.01
5.2.70.0030.04311.13
5.2.60.0030.06011.17
5.2.50.0070.04710.98
5.2.40.0030.03711.08
5.2.30.0030.06310.88
5.2.20.0030.04311.05
5.2.10.0070.05710.95
5.2.00.0070.04010.76
5.1.60.0030.05010.09
5.1.50.0070.0579.91
5.1.40.0030.05310.00
5.1.30.0070.04310.43
5.1.20.0030.03710.34
5.1.10.0070.02310.17
5.1.00.0070.05310.00
5.0.50.0070.0338.59
5.0.40.0000.0378.45
5.0.30.0030.0638.12
5.0.20.0000.0438.24
5.0.10.0000.0338.22
5.0.00.0070.0608.31
4.4.90.0070.0337.27
4.4.80.0100.0237.27
4.4.70.0000.0337.27
4.4.60.0000.0237.27
4.4.50.0070.0307.27
4.4.40.0000.0337.27
4.4.30.0000.0377.27
4.4.20.0000.0207.27
4.4.10.0070.0307.27
4.4.00.0030.0537.27
4.3.110.0070.0307.27
4.3.100.0030.0377.27
4.3.90.0070.0307.27
4.3.80.0070.0477.27
4.3.70.0000.0377.27
4.3.60.0000.0237.27
4.3.50.0000.0237.27
4.3.40.0030.0507.27
4.3.30.0030.0337.27
4.3.20.0030.0237.27
4.3.10.0070.0307.27
4.3.00.0000.0337.27

preferences:
53.9 ms | 400 KiB | 5 Q