php - Never ending do-while loop with regex -

i trying run series of patterns on xliff file. sample:

  <trans-unit id="1">     <source> "sausages". </source>     <target> j'aime bien les « sausices » </target>   </trans-unit>   <trans-unit id="2">     <source> "sausages". </source>     <target> j'aime bien les «sausices» </target>   </trans-unit> 

i parse file, , run each pattern on each target element.

    foreach($patterns $p) {         if (preg_match($p['find'], $tu[0]->target, $dummy)) {             {                 $targettext = $tu[0]->target;                 $tu[0]->target = preg_replace($p['find'], $p['repl'], $targettext, -1, $count);             } while ($count);         }     } 

for example, have array patters:

        $patterns[1] = array(             'find' => "/[«‹]\k(?!\x{00a0})\s/imu",             'repl' => " "             );         $patterns[2] = array(             'find' => "/[«‹]\k(?!\p{zs})/imu",             'repl' => " "             ); 

patter 1 should match trans-unit 1 above, , pattern 2 should match trans-unit 2. pattern 1 works fine, if run pattern 2 (only or both) loop never ends. replacement replaces normal (breaking) space after « or ‹ (pattern 1) narrow breaking space or inserts if there's no space @ (pattern 1).

i issue has second regex, can't figure out wrong expression. tips?

the \p{zs} pattern not match  , therefore add   lookahead condition in second pattern:

'find' => "/[«‹]\k(?!\p{zs}| )/iu",)                              ^^^^^^^