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run code in 150+ php & hhvm versions
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<?php $arr = array(4, 'a' => 1, 'b' => 2, 'c' => 3); next($arr); var_dump(current($arr)); $first = explode('', $arr); var_dump($first); var_dump(current($arr));
Output for 5.3.1 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
int(1) Warning: explode() expects parameter 2 to be string, array given in /in/AXEf0 on line 8 NULL int(1)
Output for 5.2.5 - 5.3.0
int(1) Notice: Array to string conversion in /in/AXEf0 on line 8 Warning: explode(): Empty delimiter in /in/AXEf0 on line 8 bool(false) int(1)
Output for 4.3.2 - 5.2.4
int(1) Notice: Array to string conversion in /in/AXEf0 on line 8 Warning: explode(): Empty delimiter. in /in/AXEf0 on line 8 bool(false) int(1)
Output for 4.3.0 - 4.3.1
int(1) Notice: Array to string conversion in /in/AXEf0 on line 8 Warning: explode() [http://www.php.net/function.explode]: Empty delimiter. in /in/AXEf0 on line 8 bool(false) int(1)