mb_str_pad

(PHP 8 >= PHP 8.3.0)

mb_str_pad — Pad a multibyte string to a certain length with another multibyte string

说明

mb_str_pad(
    string $string,
    int $length,
    string $pad_string = " ",
    int $pad_type = STR_PAD_RIGHT,
    ?string $encoding = null
): string

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

参数

string: The input string.
length: If the value of length is negative, less than, or equal to the length of the input string, no padding takes place, and string will be returned.
pad_string: 注意:
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. By default STR_PAD_RIGHT.
encoding: encoding 参数为字符编码。如果省略或是 null，则使用内部字符编码。

返回值

Returns the padded string.

示例

示例 #1 mb_str_pad() example

<?php
var_dump(mb_str_pad('▶▶', 6, '❤❓❇', STR_PAD_RIGHT)); // string(18) "▶▶❤❓❇❤"
var_dump(mb_str_pad('▶▶', 6, '❤❓❇', STR_PAD_LEFT));  // string(18) "❤❓❇❤▶▶"
var_dump(mb_str_pad('▶▶', 6, '❤❓❇', STR_PAD_BOTH));  // string(18) "❤❓▶▶❤❓"

var_dump(mb_str_pad("