3v4l.org

run code in 300+ PHP versions simultaneously
<?php $var = "12345"; $time_start = microtime(true); echo $var[0] . "-" . substr($var,1) . "\n"; $time_end = microtime(true); echo "\nExecution Time: " . $time_end - $time_start . "\n"; $time_start2 = microtime(true); echo str_replace($var[0], $var[0].'-', $var) . "\n"; $time_end2 = microtime(true); echo "\nExecution Time: " . $time_end2 - $time_start2;
Output for 7.4.1
Deprecated: The behavior of unparenthesized expressions containing both '.' and '+'/'-' will change in PHP 8: '+'/'-' will take a higher precedence in /in/nj0KD on line 7 Deprecated: The behavior of unparenthesized expressions containing both '.' and '+'/'-' will change in PHP 8: '+'/'-' will take a higher precedence in /in/nj0KD on line 12 1-2345 Warning: A non-numeric value encountered in /in/nj0KD on line 7 -1364228646.0002 1-2345 Warning: A non-numeric value encountered in /in/nj0KD on line 12 -1364228646.0003
Output for 7.4.0
Deprecated: The behavior of unparenthesized expressions containing both '.' and '+'/'-' will change in PHP 8: '+'/'-' will take a higher precedence in /in/nj0KD on line 7 Deprecated: The behavior of unparenthesized expressions containing both '.' and '+'/'-' will change in PHP 8: '+'/'-' will take a higher precedence in /in/nj0KD on line 12 1-2345 Warning: A non-numeric value encountered in /in/nj0KD on line 7 -1364228646.0003 1-2345 Warning: A non-numeric value encountered in /in/nj0KD on line 12 -1364228646.0004
Output for 7.1.1, 7.1.7, 7.1.9 - 7.1.10, 7.1.15, 7.1.20 - 7.1.21, 7.2.17, 7.2.20, 7.3.2, 7.3.5, 7.3.7 - 7.3.8, 7.3.13
1-2345 Warning: A non-numeric value encountered in /in/nj0KD on line 7 -1364228646.0002 1-2345 Warning: A non-numeric value encountered in /in/nj0KD on line 12 -1364228646.0002
Output for 7.2.19, 7.3.3, 7.3.12
1-2345 Warning: A non-numeric value encountered in /in/nj0KD on line 7 -1364228646.0003 1-2345 Warning: A non-numeric value encountered in /in/nj0KD on line 12 -1364228646.0003
Output for 7.1.3 - 7.1.4, 7.1.8, 7.1.11 - 7.1.13, 7.1.17 - 7.1.19, 7.1.22 - 7.1.23, 7.1.25, 7.1.27, 7.1.29, 7.1.31, 7.1.33, 7.2.2 - 7.2.4, 7.2.6 - 7.2.15, 7.2.21, 7.2.23 - 7.2.24, 7.3.10 - 7.3.11
1-2345 Warning: A non-numeric value encountered in /in/nj0KD on line 7 -1364228646.0001 1-2345 Warning: A non-numeric value encountered in /in/nj0KD on line 12 -1364228646.0002
Output for 7.1.6, 7.1.14, 7.1.30, 7.2.18, 7.2.22, 7.2.25 - 7.2.26, 7.3.1, 7.3.4, 7.3.9
1-2345 Warning: A non-numeric value encountered in /in/nj0KD on line 7 -1364228646.0002 1-2345 Warning: A non-numeric value encountered in /in/nj0KD on line 12 -1364228646.0003
Output for 7.2.16, 7.3.6
1-2345 Warning: A non-numeric value encountered in /in/nj0KD on line 7 -1364228646.0003 1-2345 Warning: A non-numeric value encountered in /in/nj0KD on line 12 -1364228646.0004
Output for 7.1.0, 7.1.2, 7.1.5, 7.1.16, 7.1.24, 7.1.26, 7.1.32, 7.2.0 - 7.2.1, 7.2.5, 7.3.0
1-2345 Warning: A non-numeric value encountered in /in/nj0KD on line 7 -1364228646.0001 1-2345 Warning: A non-numeric value encountered in /in/nj0KD on line 12 -1364228646.0001
Output for 7.1.28
1-2345 Warning: A non-numeric value encountered in /in/nj0KD on line 7 -1364228647.0001 1-2345 Warning: A non-numeric value encountered in /in/nj0KD on line 12 -1364228647.0002
Output for 5.4.0, 5.4.5 - 5.4.6, 5.4.16, 5.4.19, 5.4.24 - 5.4.25, 5.4.31, 5.4.38, 5.4.44, 5.5.1 - 5.5.2, 5.5.5 - 5.5.6, 5.5.8 - 5.5.10, 5.5.16, 5.5.23, 5.5.29 - 5.5.30, 5.5.32 - 5.5.34, 5.5.37 - 5.5.38, 5.6.1 - 5.6.4, 5.6.7, 5.6.14, 5.6.16, 5.6.18 - 5.6.19, 5.6.21 - 5.6.23, 5.6.26, 5.6.28 - 5.6.30, 5.6.33 - 5.6.35, 5.6.38, 7.0.4, 7.0.7 - 7.0.8, 7.0.14, 7.0.17, 7.0.21, 7.0.24, 7.0.26, 7.0.31, 7.0.33
1-2345 -1364228646.0002 1-2345 -1364228646.0002
Output for 5.3.0 - 5.3.5, 5.3.8, 5.3.10, 5.3.13 - 5.3.18, 5.3.21 - 5.3.22, 5.3.25 - 5.3.27, 5.4.17, 5.4.28 - 5.4.30, 5.4.40 - 5.4.41, 5.4.45, 5.5.12, 5.5.14, 5.5.19, 5.5.22, 5.5.25 - 5.5.27, 5.6.6, 5.6.8, 5.6.40, 7.0.3, 7.0.10, 7.0.20, 7.0.23, 7.0.32
1-2345 -1364228646.0001 1-2345 -1364228646.0001
Output for 5.4.1, 5.4.4, 5.4.8 - 5.4.9, 5.4.11, 5.4.14 - 5.4.15, 5.4.18, 5.4.21 - 5.4.23, 5.4.27, 5.4.32, 5.4.35, 5.4.37, 5.4.42 - 5.4.43, 5.5.0, 5.5.3 - 5.5.4, 5.5.7, 5.5.11, 5.5.13, 5.5.15, 5.5.17 - 5.5.18, 5.5.20 - 5.5.21, 5.5.28, 5.5.31, 5.5.35, 5.6.0, 5.6.5, 5.6.9 - 5.6.10, 5.6.12 - 5.6.13, 5.6.15, 5.6.17, 5.6.20, 5.6.25, 5.6.27, 5.6.32, 5.6.36 - 5.6.37, 7.0.1 - 7.0.2, 7.0.5 - 7.0.6, 7.0.12, 7.0.15 - 7.0.16, 7.0.18 - 7.0.19, 7.0.22, 7.0.25, 7.0.27 - 7.0.30
1-2345 -1364228646.0001 1-2345 -1364228646.0002
Output for 7.0.13
1-2345 -1364228646.0003 1-2345 -1364228646.0004
Output for 5.4.2 - 5.4.3, 5.4.7, 5.4.10, 5.4.12 - 5.4.13, 5.4.20, 5.4.26, 5.4.33, 5.4.36, 5.4.39, 5.5.24, 5.5.36, 5.6.11, 5.6.24, 5.6.31, 5.6.39, 7.0.0, 7.0.9, 7.0.11
1-2345 -1364228646.0002 1-2345 -1364228646.0003
Output for 5.4.34
1-2345 -1364228647.0001 1-2345 -1364228647.0002
Output for 5.3.6 - 5.3.7, 5.3.9, 5.3.11 - 5.3.12, 5.3.19 - 5.3.20, 5.3.23 - 5.3.24, 5.3.28 - 5.3.29
1-2345 -1364228646.0001 1-2345 -1364228646
Output for 5.2.6, 5.2.17
1-2345 -1364228646.0014 1-2345 -1364228646.0015
Output for 5.2.16
1-2345 -1364228646.0012 1-2345 -1364228646.0013
Output for 5.1.2, 5.1.4 - 5.1.5, 5.2.4, 5.2.15
1-2345 -1364228646.0018 1-2345 -1364228646.0018
Output for 5.1.3, 5.1.6, 5.2.14
1-2345 -1364228646.0018 1-2345 -1364228646.0019
Output for 5.2.11, 5.2.13
1-2345 -1364228646.0014 1-2345 -1364228646.0014
Output for 5.2.12
1-2345 -1364228646.0015 1-2345 -1364228646.0016
Output for 5.2.10
1-2345 -1364228646.0016 1-2345 -1364228646.0017
Output for 5.2.0, 5.2.7 - 5.2.9
1-2345 -1364228646.0017 1-2345 -1364228646.0017
Output for 5.2.5
1-2345 -1364228646.0016 1-2345 -1364228646.0016
Output for 5.2.3
1-2345 -1364228646.0019 1-2345 -1364228646.0019
Output for 5.2.2
1-2345 -1364228646.002 1-2345 -1364228646.002
Output for 5.2.1
1-2345 -1364228646.0015 1-2345 -1364228646.0015
Output for 5.1.1
1-2345 -1364228646.0012 1-2345 -1364228646.0012
Output for 5.1.0
1-2345 -1364228646.0011 1-2345 -1364228646.0011
Output for 5.0.1 - 5.0.2, 5.0.5
1-2345 -1364228646.0007 1-2345 -1364228646.0007
Output for 5.0.4
1-2345 -1364228646.0008 1-2345 -1364228646.0009
Output for 5.0.3
1-2345 -1364228646.0004 1-2345 -1364228646.0004
Output for 5.0.0
1-2345 -1364228646.0006 1-2345 -1364228646.0007
Output for 4.4.9
1-2345 -0.00015 1-2345 -0.000203
Output for 4.4.8
1-2345 -0.000131 1-2345 -0.000162
Output for 4.4.7
1-2345 -0.000125 1-2345 -0.00018
Output for 4.4.6
1-2345 -0.000146 1-2345 -0.0002
Output for 4.4.5
1-2345 -0.000129 1-2345 -0.000172
Output for 4.4.4
1-2345 -0.000125 1-2345 -0.000173
Output for 4.4.3
1-2345 -0.000133 1-2345 -0.000178
Output for 4.4.2
1-2345 -9.3E-05 1-2345 -0.00013
Output for 4.4.1
1-2345 -0.000134 1-2345 -0.000187
Output for 4.4.0
1-2345 -0.000115 1-2345 -0.000157
Output for 4.3.11
1-2345 -0.000125 1-2345 -0.00017
Output for 4.3.10
1-2345 -0.000129 1-2345 -0.000169
Output for 4.3.9
1-2345 -0.000139 1-2345 -0.000189
Output for 4.3.8
1-2345 -0.00012 1-2345 -0.000163
Output for 4.3.7
1-2345 -9.9E-05 1-2345 -0.000132
Output for 4.3.6
1-2345 -9.7E-05 1-2345 -0.000131
Output for 4.3.5
1-2345 -0.000134 1-2345 -0.000175
Output for 4.3.4
1-2345 -0.000136 1-2345 -0.000176
Output for 4.3.3
1-2345 -0.000119 1-2345 -0.000162
Output for 4.3.2
1-2345 -7.8E-05 1-2345 -0.000104
Output for 4.3.1
1-2345 -0.000125 1-2345 -0.000164
Output for 4.3.0
1-2345 -0.000103 1-2345 -0.000135
preferences:
212.73 ms | 401 KiB | 325 Q