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20 Feb 2010 "Fatal error: Cannot redeclare function" - Ouch. This tutorial tells you how to get around this common problem. Check if a function exists before Redeclaring a function in a child theme only works when the parent themes' function is wrapped in a if( !function_exists( 'function_name' )):. 6 Feb 2016 Fixing the PHP error: Fatal Error Cannot Redeclare Function. hex2bin is PHP library function available for PHP >= 5.4.0: php.net/manual/en/function.hex2bin.php. Pick another name.If a plugin has already defined a pluggable function, then the WP code knows not to try to redefine it. Better to avoid in logical ground of script. The above will issue a "Cannot redeclare readfile()" fatal error if readfile was disabled with 1 Aug 2017 "Fatal error: Cannot redeclare" due to simple naming convention. The. Steps To Reproduce: try to use a code base (like adminer.php) with function declarations . to optimizations for laravel. prevent global function (non-qualified) calls .. functions within a namespace); help doc notes on when/where the 27 Mar 2015 So for example if your parent theme has a page.php file and you create a new In this tutorial I'll show you three methods you can use to override the order in which functions are fired, and you can prevent functions from No I want to avoid mixing of my own files and the vanilla files, and I want to avoid hacking vanilla files. Works better then expectet, but I have I have written a snippet that contains a number of functions in it. PHP Fatal error: Cannot redeclare displayMygif() (previously declared in 6 Nov 2011 The _once siblings of include and require will force PHP to check if the file has not include / require it again, thereby preventing 'cannot redeclare x function.