#include <MsgBoxConstants.au3> ; to declare the Constants of MsgBox
Local $sRegex = "(?m)<span.*?data-snippet-php="(.*?)".*?>.*?<\/span>"
Local $sString = "HTML Code<br><span class="block" title="Label: Titel" data-snippet-php="<?php _e('Titel','grid_test') ?>" editable="false">[ Titel ]</span>: <span class="block" title="Datenfeld: Titel" data-snippet-bind="#: post_title #" editable="false">{ post_title }</span> text text text <span class="block" title="Label: Desc" data-snippet-php="<?php _e('Desc','grid_test') ?>" editable="false">[ Desc ]</span>: text text text"
Local $sSubst = "$1"
Local $sResult = StringRegExpReplace($sString, $sRegex, $sSubst)
MsgBox($MB_SYSTEMMODAL, "Result", $sResult)
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for AutoIt, please visit: https://www.autoitscript.com/autoit3/docs/functions/StringRegExp.htm