public static function check_name(): bool
  {

    $args = \func_get_args();
    // Each argument must be a string starting with a letter, and having only one character made of letters, numbers and underscores
    foreach ( $args as $a ){
      $a = self::cast($a);
      $t = preg_match('#[A-z0-9_]+#',$a,$m);
      if ( $t !== 1 || $m[0] !== $a ){
        return false;
      }
    }

    return true;
  }
public static function check_name(): bool
  {

    $args = \func_get_args();
    // Each argument must be a string starting with a letter, and having only one character made of letters, numbers and underscores
    foreach ( $args as $a ){
      $a = self::cast($a);
      $t = preg_match('#[A-z0-9_]+#',$a,$m);
      if ( $t !== 1 || $m[0] !== $a ){
        return false;
      }
    }

    return true;
  }
public static function check_name ( ) : bool { $ args = \ func_get_args ( ) ; // Each argument must be a string starting with a letter, and having only one character made of letters, numbers and underscores foreach ( $ args as $ a ) { $ a = self :: cast ( $ a ) ; $ t = preg_match ( '#[A-z0-9_]+#' , $ a , $ m ) ; if ( $ t !== 1 || $ m [ 0 ] !== $ a ) { return false ; } } return true ; }
Checks if a string complies with SQL naming convention.

```php
\bbn\x::dump(\bbn\str::check_name("Paul"));
// (bool) true
\bbn\x::dump(\bbn\str::check_name("Pa ul"));
// (bool) false
```

@return bool
Checks if a string complies with SQL naming convention .