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($value); case !_js_check_utf8($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\\\"/"); } } } $var = array( array( 'text', 1, 1.1, true, false, null, array(), new stdClass, fopen('php://stdin', 'r'), ), array( '0' => 'hoge', '1' => 'foo', ), (object)array( '0' => 'hoge', '1' => 'foo', ), array( '0' => 'hoge', '2' => 'foo', ), (object)array( '0' => 'hoge', '2' => 'foo', ), ); var_dump(@json_encode($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)
8.3.60.0110.00418.30
8.3.50.0110.00722.05
8.3.40.0040.01118.92
8.3.30.0160.00619.27
8.3.20.0040.00420.38
8.3.10.0000.00821.95
8.3.00.0040.00422.57
8.2.180.0090.00918.29
8.2.170.0040.01122.96
8.2.160.0070.00720.48
8.2.150.0040.00424.18
8.2.140.0090.00024.66
8.2.130.0040.00426.16
8.2.120.0060.00318.00
8.2.110.0200.00320.96
8.2.100.0080.00418.22
8.2.90.0000.00819.21
8.2.80.0060.00317.97
8.2.70.0000.00917.50
8.2.60.0050.00317.93
8.2.50.0000.00918.10
8.2.40.0040.00420.60
8.2.30.0000.00819.21
8.2.20.0000.00717.77
8.2.10.0050.00319.46
8.2.00.0070.00017.81
8.1.280.0090.00925.92
8.1.270.0000.00722.17
8.1.260.0040.00426.35
8.1.250.0080.00028.09
8.1.240.0070.01422.72
8.1.230.0080.00420.42
8.1.220.0040.00417.80
8.1.210.0080.00018.77
8.1.200.0060.00317.48
8.1.190.0000.00817.36
8.1.180.0040.00718.10
8.1.170.0050.00318.53
8.1.160.0030.00618.90
8.1.150.0050.00220.21
8.1.140.0050.00317.49
8.1.130.0070.00017.82
8.1.120.0050.00217.44
8.1.110.0000.00717.48
8.1.100.0040.00417.57
8.1.90.0000.00817.40
8.1.80.0000.00817.42
8.1.70.0030.00317.56
8.1.60.0070.00617.66
8.1.50.0040.00417.60
8.1.40.0000.00817.55
8.1.30.0050.00317.73
8.1.20.0030.00517.75
8.1.10.0000.00817.68
8.1.00.0040.00417.59
8.0.300.0040.00419.21
8.0.290.0030.00516.75
8.0.280.0030.00318.49
8.0.270.0000.00717.30
8.0.260.0030.00316.89
8.0.250.0020.00517.19
8.0.240.0000.01017.05
8.0.230.0070.00017.16
8.0.220.0050.00216.96
8.0.210.0000.00717.08
8.0.200.0040.00417.11
8.0.190.0000.00717.05
8.0.180.0040.00417.15
8.0.170.0080.00017.12
8.0.160.0080.00017.08
8.0.150.0030.00517.09
8.0.140.0000.00716.94
8.0.130.0030.00313.48
8.0.120.0040.00416.91
8.0.110.0000.00817.06
8.0.100.0050.00217.05
8.0.90.0050.00317.03
8.0.80.0120.00317.12
8.0.70.0040.00417.12
8.0.60.0040.00416.98
8.0.50.0050.00217.00
8.0.30.0100.01017.14
8.0.20.0170.00917.40
8.0.10.0000.00717.04
8.0.00.0110.01416.96
7.4.330.0030.00315.00
7.4.320.0000.00616.48
7.4.300.0000.00716.67
7.4.290.0080.00016.70
7.4.280.0070.00016.46
7.4.270.0040.00416.64
7.4.260.0030.00316.57
7.4.250.0040.00416.59
7.4.240.0020.00516.55
7.4.230.0000.00716.68
7.4.220.0110.00716.68
7.4.210.0110.00516.70
7.4.200.0080.00016.43
7.4.190.0040.00416.74
7.4.160.0060.01016.56
7.4.150.0120.00617.40
7.4.140.0140.00317.86
7.4.130.0050.01216.59
7.4.120.0110.00616.52
7.4.110.0110.00716.64
7.4.100.0100.00716.37
7.4.90.0120.00616.60
7.4.80.0100.01319.39
7.4.70.0100.00616.48
7.4.60.0060.00916.43
7.4.50.0000.00916.54
7.4.40.0070.01122.77
7.4.30.0070.01416.57
7.4.00.0060.01014.93
7.3.330.0000.00613.21
7.3.320.0030.00313.46
7.3.310.0040.00416.32
7.3.300.0030.00316.32
7.3.290.0060.00816.45
7.3.280.0090.01116.44
7.3.270.0110.01117.40
7.3.260.0110.00716.41
7.3.250.0110.00716.44
7.3.240.0100.00716.31
7.3.230.0060.01216.64
7.3.210.0090.01216.57
7.3.200.0140.00819.39
7.3.190.0090.01216.68
7.3.180.0110.01116.35
7.3.170.0060.01016.56
7.3.160.0090.00616.40
7.3.120.0070.00415.10
7.2.330.0200.00316.70
7.2.320.0130.01316.50
7.2.310.0100.00716.56
7.2.300.0040.01416.42
7.2.290.0070.01016.61
7.1.70.0030.00517.09
7.1.60.0060.01219.82
7.1.50.0090.01516.79
7.1.00.0070.07022.36
7.0.200.0080.00616.59
7.0.140.0000.07721.93
7.0.110.0030.07721.71
7.0.100.0070.07721.86
7.0.90.0170.07321.79
7.0.80.0000.08321.76
7.0.70.0030.05721.64
7.0.60.0000.05321.63
7.0.50.0030.08022.13
7.0.40.0000.05320.18
7.0.30.0030.08319.95
7.0.20.0000.05720.22
7.0.10.0100.06720.16
7.0.00.0070.07720.14
5.6.280.0000.07321.02
5.6.260.0000.08020.56
5.6.250.0030.08020.66
5.6.240.0030.08720.57
5.6.230.0030.08020.44
5.6.220.0070.08020.50
5.6.210.0030.08320.68
5.6.200.0130.07021.05
5.6.190.0070.07721.02
5.6.180.0000.09021.11
5.6.170.0030.08020.92
5.6.160.0070.05021.05
5.6.150.0070.03721.05
5.6.140.0070.07020.93
5.6.130.0000.07721.06
5.6.120.0070.08321.16
5.6.110.0030.08321.15
5.6.100.0000.05320.92
5.6.90.0000.07721.06
5.6.80.0030.06020.55
5.6.70.0130.06720.44
5.6.60.0070.07720.60
5.6.50.0070.07720.40
5.6.40.0000.05020.52
5.6.30.0070.07320.46
5.6.20.0000.08020.40
5.6.10.0070.06720.45
5.6.00.0070.07320.29
5.5.380.0000.07720.42
5.5.370.0030.08720.33
5.5.360.0030.07720.30
5.5.350.0070.09020.34
5.5.340.0100.06320.82
5.5.330.0000.08020.93
5.5.320.0030.04320.85
5.5.310.0030.05020.92
5.5.300.0030.07320.80
5.5.290.0070.07720.66
5.5.280.0000.09021.00
5.5.270.0170.07020.76
5.5.260.0100.07720.94
5.5.250.0030.06320.73
5.5.240.0000.08320.24
5.5.230.0070.07020.36
5.5.220.0070.07720.38
5.5.210.0030.08020.15
5.5.200.0070.05320.27
5.5.190.0100.06720.02
5.5.180.0070.08020.18
5.5.160.0100.04320.25
5.5.150.0000.07320.26
5.5.140.0000.07320.12
5.5.130.0070.04020.09
5.5.120.0030.04020.12
5.5.110.0070.07320.24
5.5.100.0000.08020.16
5.5.90.0100.05720.21
5.5.80.0100.06720.13
5.5.70.0030.05719.97
5.5.60.0030.08320.15
5.5.50.0130.06319.96
5.5.40.0030.06019.93
5.5.30.0070.07320.10
5.5.20.0130.07020.18
5.5.10.0100.07319.89
5.5.00.0070.07320.05
5.4.450.0030.07719.52
5.4.440.0000.07319.56
5.4.430.0070.07019.27
5.4.420.0000.08019.31
5.4.410.0070.07019.44
5.4.400.0000.07319.11
5.4.390.0100.06719.23
5.4.380.0100.06719.34
5.4.370.0030.07018.95
5.4.360.0130.06719.24
5.4.350.0030.07319.17
5.4.340.0030.04718.96
5.4.320.0030.06019.00
5.4.310.0100.07018.95
5.4.300.0000.07019.20
5.4.290.0100.07019.18
5.4.280.0070.05718.96
5.4.270.0030.06318.98
5.4.260.0030.04018.95
5.4.250.0070.06019.08
5.4.240.0030.05319.16
5.4.230.0030.04319.30
5.4.220.0030.07719.01
5.4.210.0000.06318.99
5.4.200.0030.04718.97
5.4.190.0000.07719.32
5.4.180.0030.06319.17
5.4.170.0070.07019.02
5.4.160.0100.06318.93
5.4.150.0000.04719.22
5.4.140.0000.07316.54
5.4.130.0000.04316.34
5.4.120.0070.03016.41
5.4.110.0030.07016.46
5.4.100.0070.06716.53
5.4.90.0030.05716.47
5.4.80.0070.07016.58
5.4.70.0070.07016.54
5.4.60.0030.07016.43
5.4.50.0030.07716.41
5.4.40.0030.05016.53
5.4.30.0030.04716.34
5.4.20.0070.03716.51
5.4.10.0100.03716.45
5.4.00.0030.06015.91
5.3.290.0030.06714.82
5.3.280.0030.07714.64
5.3.270.0030.05314.65
5.3.260.0070.07014.78
5.3.250.0070.07714.77
5.3.240.0070.05314.77
5.3.230.0000.07014.66
5.3.220.0030.05314.60
5.3.210.0000.07314.75
5.3.200.0000.07314.68
5.3.190.0000.08014.68
5.3.180.0030.06314.82
5.3.170.0000.07714.69
5.3.160.0070.07314.60
5.3.150.0100.06714.82
5.3.140.0100.07014.73
5.3.130.0000.08014.54
5.3.120.0000.07714.55
5.3.110.0030.07014.70
5.3.100.0000.07714.21
5.3.90.0000.05714.09
5.3.80.0030.06714.02
5.3.70.0030.06714.06
5.3.60.0030.07014.10
5.3.50.0070.06713.98
5.3.40.0030.07314.06
5.3.30.0070.06714.07
5.3.20.0030.06313.58
5.3.10.0030.07013.79
5.3.00.0000.07313.81
5.2.170.0030.05711.29
5.2.160.0030.05311.29
5.2.150.0070.05311.29
5.2.140.0100.02711.40
5.2.130.0070.03311.29
5.2.120.0030.06011.29
5.2.110.0000.06711.29
5.2.100.0070.05711.29
5.2.90.0030.06011.36
5.2.80.0000.06011.29
5.2.70.0000.07011.29
5.2.60.0000.06311.29
5.2.50.0030.06311.29
5.2.40.0030.05011.29
5.2.30.0070.06011.29
5.2.20.0000.05311.29
5.2.10.0030.05711.29
5.2.00.0030.05711.29
5.1.60.0000.04011.29
5.1.50.0030.05311.29
5.1.40.0030.05011.29
5.1.30.0030.04311.29
5.1.20.0000.04711.29
5.1.10.0000.05711.29
5.1.00.0030.05011.29
5.0.50.0000.03311.29
5.0.40.0000.04311.29
5.0.30.0000.06711.29
5.0.20.0000.04711.29
5.0.10.0030.04311.29
5.0.00.0030.03311.29
4.4.90.0000.03011.29
4.4.80.0000.03311.29
4.4.70.0030.03711.29
4.4.60.0030.01711.29
4.4.50.0000.03711.29
4.4.40.0000.05011.29
4.4.30.0000.03311.29
4.4.20.0030.01311.29
4.4.10.0000.03711.29
4.4.00.0000.04711.29
4.3.110.0030.03311.29
4.3.100.0000.03311.29
4.3.90.0000.03311.29
4.3.80.0070.05011.29
4.3.70.0000.03711.29
4.3.60.0070.03011.29
4.3.50.0030.03011.29
4.3.40.0070.05011.29
4.3.30.0030.03711.29
4.3.20.0000.03711.29
4.3.10.0000.03711.29
4.3.00.0000.03011.29

preferences:
49.05 ms | 401 KiB | 5 Q