PHP 字符串 strcoll()函數(shù)

strcoll() 是PHP的內置字符串函數(shù)，用于比較兩個字符串。愛掏網(wǎng) - it200.com它是基于本地化的字符串比較。愛掏網(wǎng) - it200.com

需要注意的是，strcoll()函數(shù)進行的比較是 區(qū)分大小寫的 ，就像strcmp()函數(shù)一樣，在比較過程中對大寫和小寫字母進行了區(qū)別對待。愛掏網(wǎng) - it200.com但是，它不像strcmp()函數(shù)那樣是二進制安全的。愛掏網(wǎng) - it200.com

注意：strcoll()函數(shù)是區(qū)分大小寫的，與strcmp()函數(shù)不同，它不是二進制安全的。愛掏網(wǎng) - it200.com

strcoll(str1,str2);

參數(shù)

此函數(shù)接受兩個字符串作為參數(shù)傳遞，必須要傳入。愛掏網(wǎng) - it200.com以下是對參數(shù)的描述：

1. $str1（必須） - 這是函數(shù)的第一個參數(shù)，用于比較。愛掏網(wǎng) - it200.com
2. $str2（必須） - 這是函數(shù)的第二個參數(shù)，用于比較。愛掏網(wǎng) - it200.com

兩個參數(shù)都必須傳遞給函數(shù)。愛掏網(wǎng) - it200.com

strcoll()的返回值

strcoll()返回一個隨機整數(shù)值，其取決于匹配條件。愛掏網(wǎng) - it200.com

返回0 - 如果兩個字符串相等，即 $str1 = $str2 ，則返回0。愛掏網(wǎng) - it200.com

返回 <0 - 如果第一個字符串小于第二個字符串，即 $str1 < $str2，則返回負值（<0）。愛掏網(wǎng) - it200.com

返回 >0 - 如果第一個字符串大于第二個字符串，即 $str1 > $str2，則返回正值（>0）。愛掏網(wǎng) - it200.com

注意：它計算字符串的ASCII值，然后比較兩個字符串以檢查它們是否相等、大于或小于。愛掏網(wǎng) - it200.com

示例1

<?php
    str1 = "hello php";str2 = "hello php";
    echo strcoll(str1,str2). " because both strings are equal. ";
    echo strcoll("Hello PHP", "Hello"). " because the first string is greater than the second string.";
?>

輸出：

0 because both strings are equal. 
1 because the first string is greater than the second string.

示例2

<?php
    echo strcoll("Hello php", "hello"). " because the first string is less than the second string.";
    echo "</br>";   
    echo strcoll("hello", "Hello"). " because the first string is greater than the second string.";
?>

輸出：

-1 because the first string is less than the second string.
1 because the first string is greater than the second string.

示例3

<?php
    echo strcoll("Hello ", "HELLO").  " because the first string is greater than the  second string.";
    echo "</br>";   
    echo strcoll("Hello php", "Hello php Hello"). " because the first string is less than the second string.";
?>

輸出：

1 because the first string is greater than the second string.
-1  because the first string is less than the second string.

下面是一個表格，其中包含了一些簡單的示例和strcoll()函數(shù)的解釋，以便更快地理解它。愛掏網(wǎng) - it200.com