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@ 2016-09-14T12:16:44Z

<?php
$var1= "";
$var2= "";
$var3= "3";
$temp_array = array($var1,$var2,$var3);
    $temp_count =count(array_filter($temp_array));
    if($temp_count ==1){
       echo "1 variable is not empty";
    }
    else
    {
        echo "total variable  is = ".$temp_count;
    }

Output
Performance
VLD
References
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array_filter: documentation ( source)

preferences:dark modelive previewkey bindings

30.29 ms | 404 KiB | 5 Q