PHP - Manual: str_ends_with

2024-11-14

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str_ends_with

(PHP 8)

str_ends_with — Checks if a string ends with a given substring

说明

str_ends_with(string $haystack, string $needle): bool

Performs a case-sensitive check indicating if haystack ends with needle.

参数

haystack: The string to search in.
needle: The substring to search for in the haystack.

返回值

Returns true if haystack ends with needle, false otherwise.

范例

示例 #1 Using the empty string ''


<?php
if (str_ends_with('abc', '')) {
    echo "All strings end with the empty string";
}
?>

以上例程会输出：

All strings end with the empty string

示例 #2 Showing case-sensitivity


<?php
$string = 'The lazy fox jumped over the fence';

if (str_ends_with($string, 'fence')) {
    echo "The string ends with 'fence'\n";
}

if (str_ends_with($string, 'Fence')) {
    echo 'The string ends with "fence"';
} else {
    echo '"fence" was not found because the case does not match';
}

?>

以上例程会输出：

The string ends with 'fence'
"fence" was not found because the case does not match

注释

注意: 此函数可安全用于二进制对象。

参见

str_contains() - Determine if a string contains a given substring
str_starts_with() - Checks if a string starts with a given substring
stripos() - 查找字符串首次出现的位置（不区分大小写）
strrpos() - 计算指定字符串在目标字符串中最后一次出现的位置
strripos() - 计算指定字符串在目标字符串中最后一次出现的位置（不区分大小写）
strstr() - 查找字符串的首次出现
strpbrk() - 在字符串中查找一组字符的任何一个字符
substr() - 返回字符串的子串
preg_match() - 执行匹配正则表达式

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User Contributed Notes 4 notes

down

javalc6 at gmail dot com ¶

1 year ago


In case you are using an older version of PHP (e.g. PHP 7), you can define and use the following function:

function endsWith($haystack, $needle) {
    $length = strlen($needle);
    return $length > 0 ? substr($haystack, -$length) === $needle : true;
}

down

divinity76 at gmail dot com ¶

7 months ago


this is the fastest php7-implementation i can think of, it should be faster than javalc6 and Reinder's implementations, as this one doesn't create new strings (but theirs does)

<?php
if (! function_exists('str_ends_with')) {
    function str_ends_with(string $haystack, string $needle): bool
    {
        $needle_len = strlen($needle);
        return ($needle_len === 0 || 0 === substr_compare($haystack, $needle, - $needle_len));
    }
}
?>

down

kitchin at lapage dot com ¶

4 months ago


Wordpress 5.9 RC3 does it this way:

<?php
if ( ! function_exists( 'str_ends_with' ) ) {
    function str_ends_with( $haystack, $needle ) {
        if ( '' === $haystack && '' !== $needle ) {
            return false;
        }
        $len = strlen( $needle );
        return 0 === substr_compare( $haystack, $needle, -$len, $len );
    }
}
?>

I suppose the compiler optimizes for the fact that `substr_compare()` is only being used for equality, not comparison ( <0, >0 ).

down

Reinder ¶

7 months ago


In PHP7 you may want to use:

if (!function_exists('str_ends_with')) {
  function str_ends_with($str, $end) {
    return (@substr_compare($str, $end, -strlen($end))==0);
  }
}

AFAIK that is binary safe and doesn't need additional checks.

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官方地址：https://www.php.net/manual/en/function.str-ends-with.php

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str_ends_with

说明

参数

返回值

范例

注释

参见

User Contributed Notes 4 notes