[lse123]

further tests I make show problem in scope of var[for loop since, of the two assignments neither pass: $f="y";]...how do it not only in for loop valid ?
since below the $f="y"; does NOT pass by anyway but rather pass initial $f="n"; for any value in text field ?
How a var in for loop[and this in a function] done global var ?

<?php
...
$f="n";
function check_username($username){
 for ($j=0;$j<$count;$j++) {
	$rowajax = @mysql_fetch_assoc($resultajax);

	if (strtolower($rowajax['email']) == strtolower($username)) {  
					  $f = "y";
					  break;
	}
	 $f="y";
}
}
echo check_username($username);   // after this the $f=is always="n"; the $f="y"; do not get done
...
?>

Is there any other way interupt a loop except"
break; ???

[noorahmad]

try this:

<?php
$f="n";
function check_username($username){
while($rowajax = mysql_fetch_assoc($resultajax)){
if (strtolower($rowajax['email']) == strtolower($username)) {  
                      $f = "y";
                      break;
    }
     $f="y";

}
echo check_username($username);   // after this the $f=is always="n"; the $f="y"; do not get done

}//function closed
?>