No integer (0 to 9) is allowed in a string

how to do identify a string inside has no integer (0 - 9)?
when i try to write source code for this, it make me blur...
please help... thanks...

 

You'll need to use a regular expression, do a google search for one

 

<?php

function to_echo($f_input1,$f_input2,$debug){
	if($debug == 1){
		echo $f_input1. " => ".$f_input2."<br>";
	}	
}

$name = "lu chen";
to_echo("name",$name,1);

$name1 = str_replace(" ","",$name);
to_echo("name",$name1,1);

$len_name1 = strlen($name1);
to_echo("length name",$len_name1,1);

for($a=1;$a<$len_name1+1;$a++){
	$char_name = substr($name1,$a-1,1);
	echo "str: ".$char_name."<br>";
	if(is_numeric($char_name)){
		echo "contain integer!"."<br>";
		
	}
}

?>

PHP:

finally has done... however i had written a long code just for validation of name

 

If you only want to detect, not sanitize it and remove it, you can use this.

$input = 'asda091283xxx';

if (preg_match('/([0-9]+)/', $input)) {
   echo 'You are a malicious user. Do not put numbers here.';
} else {
   echo 'You are a nice user. Thank you.';
}

PHP:

But if you want to remove it automatically, use this.

<?php
$input = 'asda091283xxx';
$clean_input = preg_replace('/([^0-9]+)/', '', $input);
echo 'New and clean one : ', $clean_input;
?>

PHP:

 

http://www.php.net/manual/function.strspn.php

if(!strspn($input, '1234567890'))
{
   // $input does not contain an int
}

Code (markup):