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<?php function ad($a=''){} if(is_int($a)){ echo $a.' >> int<br>'; }else{ echo $a.' >> not<br>'; } ad(); ad(2); ad('2'); ad(2.5); ad(0); ad(1);
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined variable $a in /in/fXrse on line 3 Warning: Undefined variable $a in /in/fXrse on line 6 >> not<br>

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