String constant php str_pad fills the string into a string of specified length

/**
* Pad the string into a string of specified length (multi-byte safe)
* @param string $str specifies the filled string
* @param int $len specifies the length of the filled string, if the value is Negative number or less than the length of the string will not be filled
* @param string $pad_str The string to be filled
* @param int $pad_type Specifies the direction of filling STR_PAD_RIGHT, STR_PAD_LEFT or STR_PAD_BOTH
* @return string
*/
// string str_pad(string $str, int $len, string $pad_str, string $pad_type);
echo str_pad($result2[0],6,"0",STR_PAD_LEFT);

Copy code The code is as follows:

$input = "Alien";
echo str_pad($input, 10); // produces "Alien "
echo str_pad($input, 10 , "-=", STR_PAD_LEFT); // produces "-=-=-Alien"
echo str_pad($input, 10, "_", STR_PAD_BOTH); // produces "__Alien___"
echo str_pad($input, 6 , "___"); // produces "Alien_"
?>

The above introduces the string constant php str_pad to fill the string into a string of specified length, including the content of string constants. I hope it will be helpful to friends who are interested in PHP tutorials.