Pad a string to a certain length with another string

Descrierea

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

This function returns the input string padded on the left, the right, or both sides to the specified padding length. If the optional argument pad_string is not supplied, the input is padded with spaces, otherwise it is padded with characters from pad_string up to the limit.

Parametri

input: The input string.
pad_length: If the value of pad_length is negative, less than, or equal to the length of the input string, no padding takes place, and input will be returned.
pad_string: Notă:
The pad_string may be truncated if the required number of padding characters can't be evenly divided by the pad_string's length.
pad_type: Optional argument pad_type can be STR_PAD_RIGHT, STR_PAD_LEFT, or STR_PAD_BOTH. If pad_type is not specified it is assumed to be STR_PAD_RIGHT.

Valorile întoarse

Returns the padded string.

Exemple

Example #1 str_pad() example


<?php
$input = "Alien";
echo str_pad($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($input,  6, "___");               // produces "Alien_"
echo str_pad($input,  3, "*");                 // produces "Alien"
?>