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'; } } } $var = array( 0 => array('text', 1, 1.1, true, false, null, array(), new stdClass), 2 => array('a' => 'hoge', 'b' => 'foo'), ); echo json_encode($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)
8.3.60.0120.00616.36
8.3.50.0150.00722.13
8.3.40.0120.00318.84
8.3.30.0110.00419.04
8.3.20.0040.00420.21
8.3.10.0000.00823.46
8.3.00.0040.00420.76
8.2.180.0140.00716.60
8.2.170.0120.00622.96
8.2.160.0070.00722.12
8.2.150.0090.00024.18
8.2.140.0040.00424.66
8.2.130.0070.00026.16
8.2.120.0080.00022.25
8.2.110.0060.00322.11
8.2.100.0040.00817.84
8.2.90.0050.00317.91
8.2.80.0000.00817.97
8.2.70.0060.00317.50
8.2.60.0040.00418.05
8.2.50.0080.00018.07
8.2.40.0030.00618.22
8.2.30.0000.00718.10
8.2.20.0050.00317.75
8.2.10.0040.00419.65
8.2.00.0040.00417.80
8.1.280.0140.00725.92
8.1.270.0080.00024.02
8.1.260.0060.00326.35
8.1.250.0050.00328.09
8.1.240.0060.00322.54
8.1.230.0070.00420.96
8.1.220.0000.00817.77
8.1.210.0030.00618.90
8.1.200.0060.00317.35
8.1.190.0080.00017.52
8.1.180.0000.00818.10
8.1.170.0000.00818.64
8.1.160.0040.00422.04
8.1.150.0000.00818.61
8.1.140.0030.00617.45
8.1.130.0040.00417.87
8.1.120.0000.00717.50
8.1.110.0020.00517.38
8.1.100.0000.00717.51
8.1.90.0040.00417.41
8.1.80.0030.00517.39
8.1.70.0000.00717.49
8.1.60.0000.00917.50
8.1.50.0030.00617.47
8.1.40.0040.00417.51
8.1.30.0060.00317.57
8.1.20.0040.00417.59
8.1.10.0040.00417.60
8.1.00.0030.00617.55
8.0.300.0060.00320.15
8.0.290.0000.00717.18
8.0.280.0040.00418.40
8.0.270.0000.00717.17
8.0.260.0000.00716.84
8.0.250.0060.00016.88
8.0.240.0030.00317.03
8.0.230.0000.00716.88
8.0.220.0030.00316.95
8.0.210.0050.00216.84
8.0.200.0040.00416.98
8.0.190.0000.00816.96
8.0.180.0050.00216.95
8.0.170.0060.00316.97
8.0.160.0030.00516.80
8.0.150.0000.00716.91
8.0.140.0040.00416.93
8.0.130.0000.00513.37
8.0.120.0030.00516.88
8.0.110.0030.00616.96
8.0.100.0050.00216.79
8.0.90.0060.00316.79
8.0.80.0100.00616.82
8.0.70.0000.00716.88
8.0.60.0070.00016.95
8.0.50.0050.00316.80
8.0.30.0090.01017.23
8.0.20.0090.01417.40
8.0.10.0030.00516.94
8.0.00.0120.00816.78
7.4.330.0060.00015.00
7.4.320.0000.00616.54
7.4.300.0030.00316.61
7.4.290.0030.00316.65
7.4.280.0000.00716.63
7.4.270.0050.00316.62
7.4.260.0000.00716.63
7.4.250.0000.00716.51
7.4.240.0040.00416.62
7.4.230.0050.00216.63
7.4.220.0160.00316.74
7.4.210.0070.00716.63
7.4.200.0040.00416.57
7.4.190.0040.00416.50
7.4.160.0130.00316.45
7.4.150.0100.00917.40
7.4.140.0110.00817.86
7.4.130.0110.00516.54
7.4.120.0120.00516.68
7.4.110.0120.00616.52
7.4.100.0140.00616.61
7.4.90.0100.01316.48
7.4.80.0180.00416.57
7.4.70.0130.00916.48
7.4.60.0070.01016.57
7.4.50.0040.00416.38
7.4.40.0060.00622.77
7.4.30.0030.01316.49
7.4.00.0040.01114.97
7.3.330.0000.00613.27
7.3.320.0000.00513.23
7.3.310.0030.00616.39
7.3.300.0000.00716.29
7.3.290.0050.00816.32
7.3.280.0110.00416.23
7.3.270.0160.00017.40
7.3.260.0070.01016.34
7.3.250.0080.01316.51
7.3.240.0120.00616.30
7.3.230.0100.00616.46
7.3.210.0110.00716.28
7.3.200.0070.01119.39
7.3.190.0070.01016.50
7.3.180.0030.01316.39
7.3.170.0070.01116.39
7.3.160.0130.00316.41
7.3.120.0060.00914.68
7.2.330.0110.00716.73
7.2.320.0040.01216.71
7.2.310.0040.01416.69
7.2.300.0100.00716.79
7.2.290.0000.01616.71
7.2.00.0000.01519.35
7.1.100.0060.00617.84
7.1.70.0040.00717.13
7.1.60.0140.01019.27
7.1.50.0100.01016.77
7.1.00.0070.07722.33
7.0.200.0000.00816.68
7.0.140.0100.06722.15
7.0.90.0030.08719.97
7.0.80.0100.07719.93
7.0.70.0630.07719.96
7.0.60.0800.07019.92
7.0.50.0430.07720.28
7.0.40.0070.08020.18
7.0.30.0000.08720.04
7.0.20.0130.08020.17
7.0.10.0100.07020.09
7.0.00.0070.08320.03
5.6.280.0030.07321.15
5.6.240.0200.07320.71
5.6.230.0070.08720.61
5.6.220.0170.07720.57
5.6.210.0070.08020.54
5.6.200.0070.08321.13
5.6.190.0000.04720.98
5.6.180.0000.08321.05
5.6.170.0070.04020.97
5.6.160.0170.04721.10
5.6.150.0130.08021.05
5.6.140.0100.07721.06
5.6.130.0130.04321.09
5.6.120.0000.05021.08
5.6.110.0070.04721.11
5.6.100.0000.04721.04
5.6.90.0000.03721.02
5.6.80.0070.03720.51
5.6.70.0100.03720.36
5.6.60.0030.03320.41
5.6.50.0070.04020.42
5.6.40.0070.03020.33
5.6.30.0130.03320.39
5.6.20.0000.03320.54
5.6.10.0070.03720.47
5.6.00.0000.04320.31
5.5.380.0030.08020.38
5.5.370.0170.07020.56
5.5.360.0000.08320.35
5.5.350.0130.07020.47
5.5.340.0070.08720.90
5.5.330.0070.07320.66
5.5.320.0070.07720.91
5.5.310.0200.07320.94
5.5.300.0170.07320.79
5.5.290.0100.04720.90
5.5.280.0070.04020.81
5.5.270.0030.04720.92
5.5.260.0130.03320.91
5.5.250.0070.03720.65
5.5.240.0070.03720.16
5.5.230.0030.08720.18
5.5.220.0030.06720.29
5.5.210.0070.03320.20
5.5.200.0030.03720.23
5.5.190.0030.04020.14
5.5.180.0000.04320.30
5.5.160.0200.02320.19
5.5.150.0030.04020.13
5.5.140.0070.03320.20
5.5.130.0100.03720.28
5.5.120.0030.04020.09
5.5.110.0000.04320.11
5.5.100.0070.03320.12
5.5.90.0130.03020.16
5.5.80.0000.03720.17
5.5.70.0100.02720.17
5.5.60.0030.03020.07
5.5.50.0000.03720.09
5.5.40.0070.03020.17
5.5.30.0100.05320.05
5.5.20.0000.03720.11
5.5.10.0030.03320.13
5.5.00.0030.06020.06
5.4.450.0030.05019.23
5.4.440.0100.03719.51
5.4.430.0070.04019.25
5.4.420.0070.03319.20
5.4.410.0030.05019.23
5.4.400.0100.02319.05
5.4.390.0000.03319.05
5.4.380.0070.02719.23
5.4.370.0030.04318.91
5.4.360.0070.03719.03
5.4.350.0000.04019.05
5.4.340.0070.03719.18
5.4.320.0000.04319.16
5.4.310.0000.04019.05
5.4.300.0000.03318.90
5.4.290.0100.04719.04
5.4.280.0030.03018.85
5.4.270.0030.04019.20
5.4.260.0070.03319.20
5.4.250.0030.03319.15
5.4.240.0000.04019.15
5.4.230.0000.04018.87
5.4.220.0030.05019.04
5.4.210.0030.03019.20
5.4.200.0030.03319.02
5.4.190.0000.03318.84
5.4.180.0000.04319.04
5.4.170.0030.04319.02
5.4.160.0070.08019.19
5.4.150.0070.07019.19
5.4.140.0100.07316.34
5.4.130.0000.07316.25
5.4.120.0030.06316.46
5.4.110.0130.06316.39
5.4.100.0030.05316.52
5.4.90.0070.04016.48
5.4.80.0030.06316.36
5.4.70.0170.06016.31
5.4.60.0100.06016.39
5.4.50.0030.05316.46
5.4.40.0100.06716.55
5.4.30.0000.06716.45
5.4.20.0100.05316.47
5.4.10.0100.07016.36
5.4.00.0100.03315.67
5.3.290.0000.04314.83
5.3.280.0070.03714.68
5.3.270.0030.03714.60
5.3.260.0070.06714.77
5.3.250.0170.05314.74
5.3.240.0030.04314.60
5.3.230.0070.06314.57
5.3.220.0030.07014.59
5.3.210.0100.07014.59
5.3.200.0100.06314.66
5.3.190.0000.04714.62
5.3.180.0070.03714.52
5.3.170.0100.06014.65
5.3.160.0130.07014.65
5.3.150.0000.07014.54
5.3.140.0030.07714.70
5.3.130.0070.07014.66
5.3.120.0070.08014.53
5.3.110.0070.07314.58
5.3.100.0000.05014.07
5.3.90.0030.08014.10
5.3.80.0200.06314.05
5.3.70.0030.05714.07
5.3.60.0000.05714.16
5.3.50.0130.06713.95
5.3.40.0070.07013.95
5.3.30.0000.04714.05
5.3.20.0030.07013.71
5.3.10.0070.06713.61
5.3.00.0270.05013.75
5.2.170.0070.05011.26
5.2.160.0000.05011.18
5.2.150.0030.06711.27
5.2.140.0070.05311.08
5.2.130.0000.06311.13
5.2.120.0100.05711.06
5.2.110.0030.07011.06
5.2.100.0070.05711.15
5.2.90.0030.06310.99
5.2.80.0030.04011.23
5.2.70.0000.03311.19
5.2.60.0000.06011.19
5.2.50.0100.04011.16
5.2.40.0030.03011.09
5.2.30.0030.04010.91
5.2.20.0030.06311.05
5.2.10.0000.03310.89
5.2.00.0000.03010.88
5.1.60.0100.04310.11
5.1.50.0170.04310.12
5.1.40.0070.05010.09
5.1.30.0100.05010.46
5.1.20.0030.06010.51
5.1.10.0070.0479.96
5.1.00.0070.05010.13
5.0.50.0000.0478.67
5.0.40.0030.0438.54
5.0.30.0000.0578.16
5.0.20.0030.0408.24
5.0.10.0030.0408.07
5.0.00.0000.0638.29
4.4.90.0000.0177.34
4.4.80.0000.0337.34
4.4.70.0070.0337.34
4.4.60.0030.0277.34
4.4.50.0030.0207.34
4.4.40.0030.0507.34
4.4.30.0070.0337.34
4.4.20.0030.0377.34
4.4.10.0030.0337.34
4.4.00.0000.0477.34
4.3.110.0030.0207.34
4.3.100.0000.0377.34
4.3.90.0030.0307.34
4.3.80.0000.0537.34
4.3.70.0030.0277.34
4.3.60.0070.0237.34
4.3.50.0000.0337.34
4.3.40.0070.0437.34
4.3.30.0030.0337.34
4.3.20.0030.0337.34
4.3.10.0000.0377.34
4.3.00.0030.0277.34

preferences:
36.32 ms | 401 KiB | 5 Q