3v4l.org

run code in 300+ PHP versions simultaneously
<?php $strings = [ '100010' => '110', '010200' => '1200', '01110' => '1110', ]; foreach ($strings as $subject => $expected) { $actual = preg_replace('/0+(?!^)/', '', $string); printf(" %s -> %s (expected: %s)\n", $subject, $actual, $expected); }
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
Warning: Undefined variable $string in /in/IPl5V on line 11 Deprecated: preg_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /in/IPl5V on line 11 100010 -> (expected: 110) Warning: Undefined variable $string in /in/IPl5V on line 11 Deprecated: preg_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /in/IPl5V on line 11 010200 -> (expected: 1200) Warning: Undefined variable $string in /in/IPl5V on line 11 Deprecated: preg_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /in/IPl5V on line 11 01110 -> (expected: 1110)
Output for 8.0.0 - 8.0.30
Warning: Undefined variable $string in /in/IPl5V on line 11 100010 -> (expected: 110) Warning: Undefined variable $string in /in/IPl5V on line 11 010200 -> (expected: 1200) Warning: Undefined variable $string in /in/IPl5V on line 11 01110 -> (expected: 1110)
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.25, 7.4.27 - 7.4.33
Notice: Undefined variable: string in /in/IPl5V on line 11 100010 -> (expected: 110) Notice: Undefined variable: string in /in/IPl5V on line 11 010200 -> (expected: 1200) Notice: Undefined variable: string in /in/IPl5V on line 11 01110 -> (expected: 1110)
Output for 7.3.32 - 7.3.33, 7.4.26
100010 -> (expected: 110) 010200 -> (expected: 1200) 01110 -> (expected: 1110)
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/IPl5V on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/IPl5V on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/IPl5V on line 3
Process exited with code 255.
preferences:
273.96 ms | 401 KiB | 461 Q