public function callback( $key, $val, $line, $group ) {
		$this->posts_per_page = (int) $this->posts_per_page;

		if ( $val > $this->posts_per_page ) {
			return 'Detected high pagination limit, `%s` is set to `%s`';
		}

		return false;
	}
public function callback( $key, $val, $line, $group ) {
		$this->posts_per_page = (int) $this->posts_per_page;

		if ( $val > $this->posts_per_page ) {
			return 'Detected high pagination limit, `%s` is set to `%s`';
		}

		return false;
	}
public function callback ( $ key , $ val , $ line , $ group ) { $ this -> posts_per_page = ( int ) $ this -> posts_per_page ; if ( $ val > $ this -> posts_per_page ) { return 'Detected high pagination limit, `%s` is set to `%s`' ; } return false ; }
Callback to process each confirmed key, to check value.

@param  string $key   Array index / key.
@param  mixed  $val   Assigned value.
@param  int    $line  Token line.
@param  array  $group Group definition.
@return mixed         FALSE if no match, TRUE if matches, STRING if matches
with custom error message passed to ->process().
Callback to process each confirmed key to check value .