note 93533 modified in function.ctype-space by danbrown

A function I wrote last night was fairly flexible in terms of detecting whitespace, and even took into account the pesky non-breaking spaces / zero-width spaces further up the Unicode alphabet. The benefit here was being able to isolate and identify specific Unicode indices based on their subrange. <?php // Returns TRUE if the ASCII value of $string matches a registered whitespace character. // * This includes non-breaking spaces, zero-width spaces, and any unicode values below 32. // * $string: Character to identify. If string extends past one character, the value // is truncated and only the initial character is examined. function is_whitespace($string){ // Return FALSE if passed an empty string. if($string == "") return FALSE; $char = ord($string); // Control Characters if($char < 33) return TRUE; if($char > 8191 && $char < 8208) return TRUE; if($char > 8231 && $char < 8240) return TRUE; // Additional Characters switch($char){ case 160: // Non-Breaking Space case 8287: // Medium Mathematical Space return TRUE; break; } return FALSE; } ?> --was-- A function I wrote last night was fairly flexible in terms of detecting whitespace, and even took into account the pesky non-breaking spaces / zero-width spaces further up the Unicode alphabet. The benefit here was being able to isolate and identify specific Unicode indices based on their subrange. // Returns TRUE if the ASCII value of $string matches a registered whitespace character. // * This includes non-breaking spaces, zero-width spaces, and any unicode values below 32. // * $string: Character to identify. If string extends past one character, the value // is truncated and only the initial character is examined. function is_whitespace($string){ // Return FALSE if passed an empty string. if($string == "") return FALSE; $char = ord($string); // Control Characters if($char < 33) return TRUE; if($char > 8191 && $char < 8208) return TRUE; if($char > 8231 && $char < 8240) return TRUE; // Additional Characters switch($char){ case 160: // Non-Breaking Space case 8287: // Medium Mathematical Space return TRUE; break; } return FALSE; } http://php.net/manual/en/function.ctype-space.php