IF语句与mb_strlen的组合不起作用[关闭]

Question

I have a form with following if-statement's but it doesn't work. The First verification "If empty" does work but not the second one with mb_strlen, why?

That's my PHP-Code:

elseif(empty($_POST['project_title']) OR 
(mb_strlen($_POST['project_title'], 'UTF-8') <= 3)){
echo "Please correct the Project Title";}

I don't get also any error. Do I have some Syntax mistakes in my Code?

Answer 1

From what I can tell, your code works fine. This little test script I ran:

<?php

echo test_title( '' );
echo test_title( 'pdf' );
echo test_title( 'This one works' );

function test_title( $title ) {

   echo "testing '$title'. ";

   if( empty( $title ) ||
       mb_strlen( $title, 'UTF-8') <= 3
     ){
        return "Please correct the Project Title
";
     }

   return "looks fine
";
}

Will output the following:

testing ''. Please correct the Project Title
testing 'pdf'. Please correct the Project Title
testing 'This one works'. looks fine