Question

我有一些条目要检查最后一个字符是否为“ s”，如果是这种情况，则将其替换（不过是UTF-8）。

例如，我有各种字符串：

$first = "Pass";
$second = "Jacks Inventory";
$third = "First Second Third etc";

如果最后一个字符为“ s”，我希望它查找每个单词，例如将其替换为“ n”。我不确定哪种方法最好。

我知道我可以使用以下代码来捕获字符串的最后一个字符（不确定这是否仍然是最好的方法）：

mb_substr($string,-1,1,'UTF-8');

但这不会对字符串中的每个单词都起作用。

Answer 1

您可以将 preg_replace() 与正则表达式/s\b/一起使用，作为preg_replace("/s\b/", "n", $string)：

<?php

$first = "Pass";
$second = "Jacks Inventory";
$third = "First Second Third etc";

// Alter depending on how you want to combine / loop over the strings
$string = $first . " " . $second . " " . $third;

echo preg_replace("/s\b/", "n", $string);
// Pasn Jackn Inventory First Second Third etc

可以在 here 上看到它。

Answer 2

您可以使用preg_replace并使用边界\b来查找以s结尾并以n代替的单词。

$arr =["Pass","Jacks Inventory", "First Second Third etc"];

foreach($arr as $val){
    echo preg_replace("/\b(\w+)(s)\b/", "$1n", $val) . "\n";
}

输出

Pasn
Jackn Inventory
First Second Third etc

https://3v4l.org/KQvGF

Answer 3

添加到答案中，这是一个无正则表达式演示

     <?php
     $gotten=array();

     $first = "Pass";
     $second = "Jacks Inventory";
     $third = "First Second Third etc";

     // No Idea How You Get the Strings, Anyway Get It into an array

     if(!in_array($first, $gotten)){
        array_push($gotten, $first);
     }

     if(!in_array($second, $gotten)){
        array_push($gotten, $second);
     }

     if(!in_array($third, $gotten)){
        array_push($gotten, $third);
    }

    for($g=0; $g<count($gotten); $g++){

       $phrase=$gotten[$g];
       $lastChar=mb_substr($phrase, -1,1,'UTF-8');

       echo($phrase . "<br>");

       if($lastChar === "s"){
          echo("Yes". "<br>");
          $newStrr=substr($phrase,0,strlen($phrase)-1)  . "n" . " (altered)";
       }else{      
          echo("No". "<br>");
          $newStrr=$phrase . " (Not Altered)" ; 
       }
       echo($newStrr . "<br>--------------------<br>");

    }

？>

替换字符串的最后一个字符

3 个答案: