Chek if a phone numbers is valid, according to its syntax (should be: "+390523599314"). True if it's valid, False otherwise
function is_valid_phone( $phone ) { if ( $phone[0] != "+" ) { return false; } // end if else { $phone = substr( $phone, 1 ); // delete the "+" if ( !is_numeric( $phone ) ) { return false; } // end if } // end else return true; } // end function is_valid_phone
Translates a number to a short alhanumeric version. e.g.: 9007199254740989 --> PpQXn7COf In most cases this is better than totally random ID generators because this can easily avoid duplicate ID's. Fo...
If file exists then delete the file. function delFile( $file_name ) { if ( file_exists( $file_name ) ) // Does '$file_name' exist { unlink( $file_name ); return true; } ...
The best way to determine the character count of a UTF8 string. function strlen_utf8( $str ) { return mb_strlen( $str, 'UTF-8' ); } //or... function strlen_utf8( $str ) { $c = 0;...
Function subwords, gets words by max num....
