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<?php ?php $string = "<img /><img />'; $i = -1; $newString = preg_replace_callback( '/<img /', function($matches){ $i++; return '<img onclick="lightbox($i);" '; },$string);
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.6
Parse error: syntax error, unexpected '?', expecting end of file in /in/dWari on line 3
Process exited with code 255.

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