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; } $i++; } if (!isset($k)) { $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'; } } } $var = array( 0 => array('text', 1, 1.1, true, false, null, new stdClass, array()), 2 => array('a' => 'hoge', 'b' => 'foo'), ); echo json_encode($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)
8.3.60.0000.01516.50
8.3.50.0070.00922.13
8.3.40.0070.01118.84
8.3.30.0140.00419.22
8.3.20.0040.00420.29
8.3.10.0000.00823.66
8.3.00.0000.00820.75
8.2.180.0120.00616.50
8.2.170.0060.01222.96
8.2.160.0030.01022.21
8.2.150.0050.00324.18
8.2.140.0050.00324.66
8.2.130.0000.00726.16
8.2.120.0040.00422.13
8.2.110.0030.00621.98
8.2.100.0090.00317.78
8.2.90.0040.00419.33
8.2.80.0040.00418.05
8.2.70.0030.00617.50
8.2.60.0040.00417.92
8.2.50.0080.00018.07
8.2.40.0040.00419.39
8.2.30.0000.00718.16
8.2.20.0030.00617.76
8.2.10.0000.00817.89
8.2.00.0030.00617.70
8.1.280.0110.00425.92
8.1.270.0040.00423.88
8.1.260.0000.00726.35
8.1.250.0070.00028.09
8.1.240.0030.00623.80
8.1.230.0110.00019.07
8.1.220.0000.00817.79
8.1.210.0080.00018.77
8.1.200.0110.00017.35
8.1.190.0030.00617.39
8.1.180.0000.00818.10
8.1.170.0080.00018.43
8.1.160.0070.00022.05
8.1.150.0040.00418.64
8.1.140.0040.00417.41
8.1.130.0000.00817.89
8.1.120.0000.00817.49
8.1.110.0040.00417.38
8.1.100.0000.00717.41
8.1.90.0000.00717.41
8.1.80.0070.00017.45
8.1.70.0070.00017.43
8.1.60.0060.00317.66
8.1.50.0030.00617.51
8.1.40.0050.00317.55
8.1.30.0000.00817.58
8.1.20.0000.00817.53
8.1.10.0030.00617.59
8.1.00.0040.00417.60
8.0.300.0030.00318.77
8.0.290.0050.00217.28
8.0.280.0070.00018.42
8.0.270.0040.00417.30
8.0.260.0080.00016.91
8.0.250.0030.00316.99
8.0.240.0040.00416.97
8.0.230.0000.00717.01
8.0.220.0070.00017.00
8.0.210.0070.00016.94
8.0.200.0000.00616.86
8.0.190.0050.00316.89
8.0.180.0000.00716.93
8.0.170.0000.00816.96
8.0.160.0000.00716.80
8.0.150.0000.00816.85
8.0.140.0000.00816.80
8.0.130.0000.00513.40
8.0.120.0000.00816.94
8.0.110.0040.00416.92
8.0.100.0040.00416.79
8.0.90.0030.00516.72
8.0.80.0120.00616.86
8.0.70.0050.00316.94
8.0.60.0000.00716.99
8.0.50.0000.00716.80
8.0.30.0100.01217.02
8.0.20.0080.01217.40
8.0.10.0040.00417.05
8.0.00.0160.00516.95
7.4.330.0050.00015.16
7.4.320.0000.00616.63
7.4.300.0000.00716.46
7.4.290.0030.00316.63
7.4.280.0000.00716.48
7.4.270.0070.00016.56
7.4.260.0000.00816.63
7.4.250.0000.00716.63
7.4.240.0020.00516.65
7.4.230.0030.00316.44
7.4.220.0100.00716.53
7.4.210.0110.00316.58
7.4.200.0030.00316.62
7.4.190.0070.00016.77
7.4.160.0160.00916.46
7.4.150.0140.00417.40
7.4.140.0130.00617.86
7.4.130.0090.01016.49
7.4.120.0090.00816.48
7.4.110.0100.00716.42
7.4.100.0180.00016.61
7.4.90.0070.01016.59
7.4.80.0090.00916.67
7.4.70.0070.01016.47
7.4.60.0070.01016.60
7.4.50.0040.00416.22
7.4.40.0080.00622.77
7.4.30.0100.01316.66
7.4.00.0110.00415.06
7.3.330.0030.00313.13
7.3.320.0030.00313.16
7.3.310.0000.00716.15
7.3.300.0030.00316.28
7.3.290.0070.00716.24
7.3.280.0100.00816.23
7.3.270.0170.00317.40
7.3.260.0180.00616.32
7.3.250.0120.00516.46
7.3.240.0140.00416.30
7.3.230.0070.01116.44
7.3.210.0120.00616.37
7.3.200.0070.01019.39
7.3.190.0110.00616.26
7.3.180.0090.00616.39
7.3.170.0070.01016.64
7.3.160.0150.00816.25
7.3.120.0070.00715.01
7.2.330.0090.01216.49
7.2.320.0050.01116.48
7.2.310.0130.00316.74
7.2.300.0090.00916.48
7.2.290.0030.01916.32
7.2.00.0030.00919.31
7.1.100.0050.00518.17
7.1.70.0050.00516.81
7.1.60.0070.01419.32
7.1.50.0110.01516.50
7.1.00.0030.07722.30
7.0.200.0030.00716.68
7.0.140.0030.07322.07
7.0.110.0630.05020.07
7.0.100.0570.07319.99
7.0.90.0570.06019.95
7.0.80.0700.07319.91
7.0.70.0630.07019.91
7.0.60.0430.08019.93
7.0.50.0730.07320.46
7.0.40.0070.07720.00
7.0.30.0130.07720.00
7.0.20.0100.07320.10
7.0.10.0130.04720.16
7.0.00.0200.06320.17
5.6.280.0030.07321.10
5.6.260.0030.09020.47
5.6.250.0030.07720.59
5.6.240.0070.07320.66
5.6.230.0170.07320.65
5.6.220.0030.08020.66
5.6.210.0100.07320.70
5.6.200.0100.08321.05
5.6.190.0070.08721.05
5.6.180.0070.08321.02
5.6.170.0070.08321.24
5.6.160.0200.06321.11
5.6.150.0030.08021.11
5.6.140.0070.08720.90
5.6.130.0070.08321.18
5.6.120.0200.06021.05
5.6.110.0070.08021.10
5.6.100.0070.06021.23
5.6.90.0030.04721.14
5.6.80.0170.07020.29
5.6.70.0170.06320.46
5.6.60.0100.05720.47
5.6.50.0100.06320.61
5.6.40.0170.07020.59
5.6.30.0030.07320.59
5.6.20.0070.04020.23
5.6.10.0100.05320.27
5.6.00.0100.08020.43
5.5.380.0000.05320.23
5.5.370.0030.08320.25
5.5.360.0100.07320.48
5.5.350.0130.07320.41
5.5.340.0130.06320.67
5.5.330.0130.07720.80
5.5.320.0100.07320.99
5.5.310.0030.08020.77
5.5.300.0130.07720.91
5.5.290.0130.07720.85
5.5.280.0100.07720.70
5.5.270.0100.08020.76
5.5.260.0070.08020.75
5.5.250.0100.06020.76
5.5.240.0130.06020.24
5.5.230.0100.07720.09
5.5.220.0070.07720.37
5.5.210.0100.07020.31
5.5.200.0030.07320.20
5.5.190.0130.07320.30
5.5.180.0100.07320.09
5.5.160.0170.07020.09
5.5.150.0100.07320.34
5.5.140.0100.07320.21
5.5.130.0070.07720.21
5.5.120.0070.07720.00
5.5.110.0070.07720.21
5.5.100.0000.07320.13
5.5.90.0070.04320.04
5.5.80.0200.06320.07
5.5.70.0170.07320.07
5.5.60.0200.06320.14
5.5.50.0100.07320.23
5.5.40.0070.07020.09
5.5.30.0000.08020.18
5.5.20.0030.08320.18
5.5.10.0130.06319.98
5.5.00.0070.07720.00
5.4.450.0170.07719.32
5.4.440.0170.07019.36
5.4.430.0100.05019.33
5.4.420.0130.04319.60
5.4.410.0100.03719.20
5.4.400.0130.07019.20
5.4.390.0130.07019.02
5.4.380.0070.05019.03
5.4.370.0170.06719.19
5.4.360.0030.07319.18
5.4.350.0030.05019.18
5.4.340.0100.07319.22
5.4.320.0100.07319.18
5.4.310.0030.08019.17
5.4.300.0030.05019.13
5.4.290.0130.07318.98
5.4.280.0130.07319.18
5.4.270.0030.06019.01
5.4.260.0030.08019.02
5.4.250.0000.07019.33
5.4.240.0070.07019.23
5.4.230.0030.05019.00
5.4.220.0100.07319.01
5.4.210.0030.08319.00
5.4.200.0130.06719.01
5.4.190.0100.07018.95
5.4.180.0100.07018.94
5.4.170.0070.07319.30
5.4.160.0030.07019.29
5.4.150.0100.07019.18
5.4.140.0030.07016.40
5.4.130.0070.08016.53
5.4.120.0030.07016.38
5.4.110.0070.07316.41
5.4.100.0100.07016.50
5.4.90.0100.07016.61
5.4.80.0070.07316.45
5.4.70.0100.06716.46
5.4.60.0100.07016.43
5.4.50.0000.07016.52
5.4.40.0070.06716.34
5.4.30.0170.06316.43
5.4.20.0070.07016.52
5.4.10.0030.07316.38
5.4.00.0100.07315.84
5.3.290.0070.08014.72
5.3.280.0000.08014.64
5.3.270.0130.06314.86
5.3.260.0000.08014.78
5.3.250.0070.07314.64
5.3.240.0070.07314.77
5.3.230.0070.07714.71
5.3.220.0100.07014.61
5.3.210.0070.06714.82
5.3.200.0070.07314.59
5.3.190.0170.06014.61
5.3.180.0070.08014.67
5.3.170.0170.06714.59
5.3.160.0000.08014.68
5.3.150.0100.07314.73
5.3.140.0170.06014.73
5.3.130.0000.06014.58
5.3.120.0130.06714.57
5.3.110.0100.04014.57
5.3.100.0070.07714.30
5.3.90.0030.07014.13
5.3.80.0070.07014.13
5.3.70.0070.07314.04
5.3.60.0030.07313.88
5.3.50.0070.04313.95
5.3.40.0170.05314.11
5.3.30.0000.07013.91
5.3.20.0100.07013.74
5.3.10.0030.06713.64
5.3.00.0170.06013.89
5.2.170.0070.03311.82
5.2.160.0070.05711.82
5.2.150.0000.07011.82
5.2.140.0030.06311.82
5.2.130.0070.03311.82
5.2.120.0070.06311.82
5.2.110.0030.05711.82
5.2.100.0070.06011.82
5.2.90.0000.06311.82
5.2.80.0030.06311.82
5.2.70.0100.05711.82
5.2.60.0030.05311.82
5.2.50.0100.06011.82
5.2.40.0030.03711.82
5.2.30.0070.06311.82
5.2.20.0100.05311.82
5.2.10.0030.03311.82
5.2.00.0000.05311.82
5.1.60.0030.02711.82
5.1.50.0030.03711.82
5.1.40.0070.03011.82
5.1.30.0070.05311.82
5.1.20.0000.06011.82
5.1.10.0030.05711.82
5.1.00.0030.05311.82
5.0.50.0030.04311.82
5.0.40.0070.04011.82
5.0.30.0030.06711.82
5.0.20.0070.04011.82
5.0.10.0100.04011.82
5.0.00.0070.05311.82
4.4.90.0030.02311.82
4.4.80.0030.03311.82
4.4.70.0070.03011.82
4.4.60.0030.03011.82
4.4.50.0000.03711.82
4.4.40.0030.05011.82
4.4.30.0030.03011.82
4.4.20.0000.02011.82
4.4.10.0000.03711.82
4.4.00.0030.05011.82
4.3.110.0070.03011.82
4.3.100.0000.03711.82
4.3.90.0000.03011.82
4.3.80.0030.04311.82
4.3.70.0030.03311.82
4.3.60.0030.01711.82
4.3.50.0030.03311.82
4.3.40.0100.04311.82
4.3.30.0030.03711.82
4.3.20.0000.03711.82
4.3.10.0070.03011.82
4.3.00.0030.03311.82

preferences:
46.19 ms | 401 KiB | 5 Q