<?php $singleLine = ['line 1 first item', 'line 1 second item']; var_dump(str_replace('item', 'ITEM', $singleLine)); $lines = [ ['line 1 first item', 'line 1 second item'], ['line 2 first item', 'line 2 second item'], ]; var_dump(str_replace('item', 'ITEM', $lines));
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