Fatal error: Uncaught Error: Function name must be a string in app/code/core/Mage/Core/Model/Layout.php:555 · Issue #84 · Inchoo/Inchoo_PHP7 · GitHub
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Lambda Functions & Closures A Sydney PHP Group Presentation 2 nd October 2008 By Timothy Chandler. - ppt download
Function name must be callable - a string, Closure or class implementing __invoke, currently array : WI-16531
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