Str_pad () uses another string to populate the string with the specified length.

string str_pad ( string $input, int $pad_length
    [, string $pad_string=" "[, int $pad_type=STR_PAD_RIGHT]])
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Parameters to describe

input

Input a string.

pad_length

If the value of pad_length is negative, less than or equal to the length of the input string, no padding will occur.

pad_string

If the length of the padding character is not divisible by pad_string, then pad_string may be shortened.

pad_type

The possible values of the optional pad_type parameter are STR_PAD_RIGHT, STR_PAD_LEFT, or STR_PAD_BOTH. If pad_type is not specified, it is assumed to be STR_PAD_RIGHT.

The return value:

This function returns the result of input being filled to a specified length from the left, right, or both ends. If the optional pad_string argument is not specified, input will be filled with space characters, otherwise it will be filled with pad_string to the specified length

Example:

<? php $input="Alien"; echo str_pad($input,10); / / output "Alien" echo str_pad ($input, 10, "_", STR_PAD_BOTH); // output "__Alien___" echo str_pad($input,6,"___"); / / output Alien_ ""Copy the code