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PHP

Pad a string to a certain length with another string


str_pad

(PHP 4 >= 4.0.1, PHP 5)

str_padPad a string to a certain length with another string

Description

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

This functions 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.

Parameters

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.

pad_string

Note:

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.

Return Values

Returns the padded string.

Examples

Example #1 str_pad() example

<?php
$input 
"Alien";
echo 
str_pad($input10);                      // produces "Alien     "
echo str_pad($input10"-="STR_PAD_LEFT);  // produces "-=-=-Alien"
echo str_pad($input10"_"STR_PAD_BOTH);   // produces "__Alien___"
echo str_pad($input"___");               // produces "Alien_"
?>



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