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run code in 150+ php & hhvm versions
Bugs & Features
<?php class Reference { function __construct($value) { $this->reference = $value; } function startsWith($something, $start = 0) { if (mt_rand() % 2) { return strpos($this->reference, $something) === $start; } else { return substr($this->reference, $start, strlen($something)) == $something; } } } $subject = new Reference("AWB012345"); $result = $subject->startsWith("AWB0"); var_dump($result); $subject = new Reference("12345"); $result = $subject->startsWith("AWB0"); var_dump($result);
based on rrQuc
Output for 5.0.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
bool(true) bool(false)
Output for hhvm-3.10.0

Process exited with code 153.
Output for 4.3.1, 4.3.3, 4.3.8, 4.4.1, 4.4.3, 4.4.7 - 4.4.9
Notice: Undefined property: reference in /in/XaDMq on line 10 bool(false) Notice: Undefined property: reference in /in/XaDMq on line 10 bool(false)
Output for 4.3.2, 4.3.5, 4.4.6
Notice: Undefined property: reference in /in/XaDMq on line 10 bool(false) Notice: Undefined property: reference in /in/XaDMq on line 13 bool(false)
Output for 4.3.0, 4.3.4, 4.3.9, 4.4.0, 4.4.2, 4.4.5
Notice: Undefined property: reference in /in/XaDMq on line 13 bool(false) Notice: Undefined property: reference in /in/XaDMq on line 10 bool(false)
Output for 4.3.6 - 4.3.7, 4.3.10 - 4.3.11, 4.4.4
Notice: Undefined property: reference in /in/XaDMq on line 13 bool(false) Notice: Undefined property: reference in /in/XaDMq on line 13 bool(false)