php check if string contains only whitespace code example

Example 1: if name value contains space in php

if ($str == trim($str) && strpos($str, ' ') !== false) {
    echo 'has spaces, but not at beginning or end';
}

Example 2: check if string contains only whitespace php

ctype_space("  ") //returns true

ctype_space("   a   ") //returns false