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<?php $input = <<<STR <p>{{ myFunction()&nbsp; }}</p> <p>&nbsp;</p> <p>{{ number|number_format(2, "&nbsp;.&nbsp;", '&nbsp;,&nbsp;')&nbsp;}}</p> <p>{% set myVariable = '&nbsp;&nbsp;' %}</p> STR; echo preg_replace('/&nbsp;(?=(?:(?!{[{%]).)*[%}]})/', ' ', $input);

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54.72 ms | 402 KiB | 5 Q