3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Foo { public $bar; } $foo = new Foo; $baz = array(); $blanks = array( "string(empty) \"\"" => "", "string(space) \" \"" => " ", "bool(false)" => FALSE, "bool(true)" => TRUE, "array(empty) {}" => array(), "array(1) { [\"empty_item\"] }" => $baz["qux"], "NULL" => NULL, "string(\"zero\") \"0\"" => "0", "int(0)" => 0, "float(0.0)" => 0.0, "object(stdClass)# (empty) {}" => new stdClass, "public \$bar; (unassigned)" => $foo->bar, "string(null byte) \"\\0\"" => "\0" ); $headings = array( 'type', 'if', #'isset', 'empty', 'is_null', '== null', #'=== null', '== ""', '=== ""', "!", ); foreach(array($headings, array_keys($blanks)) as $ord => $arr){ foreach($arr as $val){ static $max = 0; if(strlen($val) > $max){ $max = strlen($val); } } ${"pad_$ord"} = $max; } for($i = 0; $i < 2; $i++){ foreach($headings as $j => $heading){ if($i == 0){ echo str_pad($heading, $j == 0 ? $pad_1 : $pad_0), " | "; } else { echo str_pad("", $j == 0 ? $pad_1 : $pad_0, "-"), "-+-"; } } echo "\n"; } $true = str_pad("TRUE", $pad_0) . " | "; $false = str_pad("", $pad_0) . " | "; foreach($blanks as $readable => $blank){ echo str_pad($readable, $pad_1), " | "; echo $blank ? $true : $false; #echo isset($blank) ? $true : $false; echo empty($blank) ? $true : $false; echo is_null($blank) ? $true : $false; echo $blank == null ? $true : $false; #echo $blank === null ? $true : $false; echo $blank == "" ? $true : $false; echo $blank === "" ? $true : $false; echo !$blank ? $true : $false; echo "\n"; } echo "\n\n", '# Note: ', "\n"; echo '`!isset()`, `is_null()` and `=== null` are functionaly equivalent.', "\n"; echo '`!` and `empty()` are functionaly equivalent.', "\n";

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)
8.3.60.0150.00616.73
8.3.50.0070.01421.99
8.3.40.0110.00418.88
8.3.30.0130.01018.57
8.3.20.0050.00320.33
8.3.10.0080.00023.66
8.3.00.0040.00419.26
8.2.180.0120.00618.41
8.2.170.0150.00022.96
8.2.160.0110.00422.08
8.2.150.0000.00824.18
8.2.140.0050.00324.66
8.2.130.0080.00026.16
8.2.120.0090.00017.75
8.2.110.0000.00921.09
8.2.100.0000.01117.95
8.2.90.0060.00318.00
8.2.80.0000.00917.97
8.2.70.0080.00017.50
8.2.60.0000.00817.87
8.2.50.0060.00318.07
8.2.40.0080.00019.23
8.2.30.0050.00220.74
8.2.20.0050.00317.83
8.2.10.0000.00818.14
8.2.00.0050.00218.20
8.1.280.0100.01025.92
8.1.270.0080.00023.82
8.1.260.0080.00026.35
8.1.250.0080.00028.09
8.1.240.0100.00722.51
8.1.230.0090.00321.03
8.1.220.0000.00817.74
8.1.210.0050.00318.95
8.1.200.0070.00317.22
8.1.190.0000.00817.23
8.1.180.0050.00318.10
8.1.170.0040.00418.88
8.1.160.0050.00222.04
8.1.150.0000.00718.92
8.1.140.0040.00419.52
8.1.130.0020.00517.80
8.1.120.0040.00417.48
8.1.110.0050.00317.41
8.1.100.0050.00317.50
8.1.90.0020.00517.52
8.1.80.0000.00817.50
8.1.70.0030.00317.52
8.1.60.0040.00517.64
8.1.50.0040.00417.45
8.1.40.0000.01217.43
8.1.30.0060.00317.68
8.1.20.0000.00817.60
8.1.10.0030.00617.63
8.1.00.0050.00317.47
8.0.300.0060.00320.03
8.0.290.0030.00616.75
8.0.280.0040.00418.57
8.0.270.0000.00717.29
8.0.260.0030.00317.34
8.0.250.0000.00717.08
8.0.240.0040.00417.10
8.0.230.0040.00417.09
8.0.220.0050.00316.86
8.0.210.0050.00316.96
8.0.200.0040.00417.05
8.0.190.0040.00417.05
8.0.180.0000.00816.89
8.0.170.0000.00816.94
8.0.160.0080.00016.98
8.0.150.0000.00716.90
8.0.140.0070.00016.85
8.0.130.0000.00813.35
8.0.120.0050.00316.87
8.0.110.0030.00517.02
8.0.100.0040.00416.82
8.0.90.0070.00016.88
8.0.80.0110.00417.04
8.0.70.0000.00717.10
8.0.60.0070.00316.84
8.0.50.0050.00316.98
8.0.30.0080.01517.29
8.0.20.0120.00917.40
8.0.10.0000.00817.01
8.0.00.0090.01016.75
7.4.330.0030.00315.08
7.4.320.0030.00316.55
7.4.300.0050.00316.55
7.4.290.0070.00016.61
7.4.280.0000.00716.57
7.4.270.0030.00516.46
7.4.260.0000.00716.55
7.4.250.0030.00516.40
7.4.240.0000.00816.54
7.4.230.0000.00716.49
7.4.220.0100.01016.73
7.4.210.0060.00916.64
7.4.200.0000.00816.43
7.4.160.0100.00816.64
7.4.150.0040.01517.40
7.4.140.0150.00717.86
7.4.130.0100.00916.63
7.4.120.0120.00616.71
7.4.110.0100.01016.47
7.4.100.0210.00416.50
7.4.90.0130.00816.60
7.4.80.0070.01319.39
7.4.70.0090.00916.51
7.4.60.0070.01116.32
7.4.50.0000.00816.42
7.4.40.0120.00916.72
7.4.30.0030.01316.54
7.4.10.0090.01215.05
7.4.00.0070.00815.09
7.3.330.0050.00013.43
7.3.320.0030.00313.49
7.3.310.0040.00416.50
7.3.300.0070.00016.47
7.3.290.0070.01116.44
7.3.280.0100.00716.45
7.3.270.0150.00417.40
7.3.260.0090.00916.46
7.3.250.0110.00916.57
7.3.240.0140.00816.53
7.3.230.0060.01316.46
7.3.210.0070.01316.42
7.3.200.0030.01416.57
7.3.190.0170.00016.75
7.3.180.0070.01016.47
7.3.170.0070.01416.43
7.3.160.0080.00916.69
7.3.130.0100.01314.93
7.3.120.0030.01415.05
7.3.110.0060.01314.74
7.3.100.0020.01615.15
7.3.90.0030.01215.02
7.3.80.0000.01214.82
7.3.70.0030.00614.91
7.3.60.0070.01015.03
7.3.50.0000.01514.71
7.3.40.0040.01114.78
7.3.30.0100.00714.89
7.3.20.0070.00716.77
7.3.10.0050.00916.54
7.3.00.0090.00616.71
7.2.330.0060.01316.77
7.2.320.0180.00016.68
7.2.310.0160.00316.47
7.2.300.0030.01616.64
7.2.290.0000.01816.77
7.2.260.0060.01215.11
7.2.250.0070.00714.99
7.2.240.0080.00415.42
7.2.230.0070.01015.08
7.2.220.0070.00715.35
7.2.210.0050.00514.99
7.2.200.0090.00615.07
7.2.190.0100.00514.95
7.2.180.0030.00615.18
7.2.170.0100.00715.04
7.2.160.0070.00715.24
7.2.150.0070.00416.99
7.2.140.0100.00716.72
7.2.130.0060.00916.87
7.2.120.0060.00616.77
7.2.110.0070.00816.72
7.2.100.0100.00716.81
7.2.90.0050.00716.85
7.2.80.0030.01116.74
7.2.70.0090.00816.75
7.2.60.0060.01016.77
7.2.50.0060.01016.79
7.2.40.0070.00816.92
7.2.30.0040.01116.87
7.2.20.0110.00416.73
7.2.10.0100.00716.74
7.2.00.0050.01017.55
7.1.330.0030.01015.74
7.1.320.0000.01615.79
7.1.310.0060.00915.71
7.1.300.0070.00315.76
7.1.290.0080.00415.84
7.1.280.0000.01515.81
7.1.270.0100.00715.88
7.1.260.0060.00615.75
7.1.250.0050.00915.71
7.1.240.0040.00915.83
7.1.230.0090.00615.73
7.1.220.0030.01015.75
7.1.210.0070.00815.76
7.1.200.0030.01315.64
7.1.190.0110.00315.78
7.1.180.0050.00815.91
7.1.170.0060.00515.78
7.1.160.0030.01315.77
7.1.150.0030.00915.69
7.1.140.0060.00815.62
7.1.130.0040.00915.84
7.1.120.0080.00215.79
7.1.110.0020.01315.90
7.1.100.0070.00416.53
7.1.90.0050.00815.87
7.1.80.0100.00515.65
7.1.70.0070.00616.24
7.1.60.0100.00916.94
7.1.50.0060.01316.08
7.1.40.0050.00815.80
7.1.30.0030.01015.70
7.1.20.0070.00815.53
7.1.10.0070.00715.74
7.1.00.0050.03017.73
7.0.330.0050.00815.28
7.0.320.0090.00615.14
7.0.310.0020.01015.34
7.0.300.0080.00615.38
7.0.290.0050.01115.25
7.0.280.0020.00915.22
7.0.270.0070.00715.13
7.0.260.0090.00615.25
7.0.250.0040.00815.49
7.0.240.0060.00715.28
7.0.230.0060.01115.37
7.0.220.0030.01215.28
7.0.210.0090.00615.29
7.0.200.0050.00815.18
7.0.190.0070.00715.36
7.0.180.0060.00715.15
7.0.170.0120.00215.23
7.0.160.0050.00815.05
7.0.150.0030.01015.27
7.0.140.0050.00815.32
7.0.130.0020.01415.54
7.0.120.0060.00615.33
7.0.110.0070.00715.26
7.0.100.0060.00615.30
7.0.90.0130.00115.15
7.0.80.0070.00715.50
7.0.70.0100.00315.36
7.0.60.0070.03117.01
7.0.50.0050.03516.18
7.0.40.0090.02215.72
7.0.30.0100.03615.61
7.0.20.0170.02615.59
7.0.10.0070.03115.64
7.0.00.0050.02015.74
5.6.400.0100.00314.42
5.6.390.0030.00913.92
5.6.380.0040.00814.38
5.6.370.0090.00414.34
5.6.360.0040.01014.35
5.6.350.0060.00914.26
5.6.340.0050.00514.32
5.6.330.0070.00914.21
5.6.320.0070.00914.40
5.6.310.0060.00814.16
5.6.300.0060.00714.41
5.6.290.0040.00914.17
5.6.280.0030.02716.57
5.6.270.0080.00714.29
5.6.260.0050.00714.26
5.6.250.0000.01414.28
5.6.240.0060.00914.37
5.6.230.0060.00514.26
5.6.220.0060.00814.39
5.6.210.0070.02016.52
5.6.200.0100.03115.57
5.6.190.0030.02016.38
5.6.180.0140.02016.40
5.6.170.0070.03016.37
5.6.160.0100.02016.31
5.6.150.0080.02615.53
5.6.140.0060.02515.70
5.6.130.0060.01915.62
5.6.120.0070.03316.58
5.6.110.0090.03116.56
5.6.100.0030.03716.56
5.6.90.0080.02316.51
5.6.80.0090.03016.38
5.6.70.0040.00414.41
5.6.60.0100.00414.35
5.6.50.0050.00814.19
5.6.40.0080.00714.42
5.6.30.0060.00814.28
5.6.20.0080.00314.20
5.6.10.0110.00614.31
5.6.00.0100.00614.05
5.5.380.0070.00512.79
5.5.370.0040.00913.02
5.5.360.0110.00112.77
5.5.350.0190.02715.20
5.5.340.0070.03114.59
5.5.330.0110.02715.18
5.5.320.0140.02915.37
5.5.310.0080.01915.33
5.5.300.0090.02714.44
5.5.290.0040.02814.60
5.5.280.0060.02215.48
5.5.270.0100.02115.41
5.5.260.0050.02815.52
5.5.250.0050.02815.32
5.5.240.0050.01615.21
5.5.230.0050.01012.84
5.5.220.0060.00712.77
5.5.210.0060.00612.74
5.5.200.0070.00512.74
5.5.190.0030.00612.76
5.5.180.0060.00612.64
5.5.170.0050.00712.68
5.5.160.0040.00612.81
5.5.150.0020.00912.72
5.5.140.0080.00412.76
5.5.130.0020.00712.82
5.5.120.0070.00412.76
5.5.110.0020.00812.61
5.5.100.0050.00712.66
5.5.90.0050.00512.88
5.5.80.0050.00712.70
5.5.70.0070.00512.75
5.5.60.0060.00512.74
5.5.50.0040.00812.70
5.5.40.0090.00312.87
5.5.30.0020.00812.86
5.5.20.0030.00612.72
5.5.10.0020.00912.85
5.5.00.0080.00512.64
5.4.450.0230.03014.02
5.4.440.0240.02514.07
5.4.430.0210.03214.03
5.4.420.0230.03113.89
5.4.410.0150.03313.84
5.4.400.0270.02713.88
5.4.390.0280.02513.85
5.4.380.0260.02613.78
5.4.370.0290.02013.92
5.4.360.0090.02713.89
5.4.350.0220.02313.78
5.4.340.0240.02713.80
5.4.330.0040.00711.19
5.4.320.0210.02513.71
5.4.310.0210.02213.77
5.4.300.0210.02713.74
5.4.290.0220.02213.84
5.4.280.0150.02713.82
5.4.270.0230.02413.82
5.4.260.0230.02713.79
5.4.250.0160.02813.78
5.4.240.0230.02713.73
5.4.230.0170.02313.96
5.4.220.0120.02513.78
5.4.210.0120.02413.86
5.4.200.0170.02113.88
5.4.190.0130.02513.88
5.4.180.0140.02513.73
5.4.170.0120.02313.81
5.4.160.0070.02913.84
5.4.150.0130.02613.82
5.4.140.0100.02313.00
5.4.130.0100.01913.03
5.4.120.0090.02012.88
5.4.110.0080.02412.93
5.4.100.0240.02512.83
5.4.90.0230.02712.97
5.4.80.0150.02912.95
5.4.70.0130.02913.00
5.4.60.0230.02312.99
5.4.50.0240.01912.93
5.4.40.0200.02112.90
5.4.30.0070.02612.92
5.4.20.0230.02813.04
5.4.10.0130.02413.05
5.4.00.0170.02012.79

preferences:
40.26 ms | 401 KiB | 5 Q