Question

我有一个包含这样的值的数组变量：

$items = array(
 "tbFrench",
 "eaItaly1",
 "discount21",
 "kkMM5",
 "NbndA",
 "fcMNSS334"
);

如果最后一个字符包含数字，则需要从此数组值中删除字符串的最后一个字符，例如：

$newItems = array();
foreach($items as $item){
  $newItems[] = $this->removeLastCharacter($item);
}
print_r($newItems);
....
function removeLastCharacter($string){
 // ????
}

当我print_r $newItems变量时，我希望结果看起来像这样：

Array ( [0] => tbFrench [1] => eaItaly [2] => discount2 [3] => kkMM [4] => NbndA [5] => fcMNSS33 )

Answer 1

您可以使用正则表达式删除最后一位。

function removeLastCharacter($string){
    return preg_replace('[\d$]', '', $string);
}

\d匹配每个数字，$引用字符串的结尾。因此，只有在末尾是数字时，才会替换最后一个字符。

Answer 2

您只需将数组作为主题即可对数组中的所有项目进行RegEx替换，如下所示：

$items = preg_replace('/^d$/', '', $items);

根本不需要将其放入函数中-print_r($items)输出：

Array
(
    [0] => tbFrench
    [1] => eaItaly
    [2] => discount2
    [3] => kkMM
    [4] => NbndA
    [5] => fcMNSS33
)

如果您要替换所有后缀数字，可以使用/^\d+$/

Answer 3

如果可以解决您的问题，请尝试以下代码

$items = array(
 "tbFrench",
 "eaItaly1",
 "discount21",
 "kkMM5",
 "NbndA",
 "fcMNSS334"
);

$newArr=array();
foreach($items as $item){
     $data = preg_replace('[\d$]','',$item);
     array_push($newArr,$data);
}

print_r($newArr);

Answer 4

为什么不简单？

print_r( preg_replace( '/\d+$/', "", $items ) ); // preg_replace accepts an array as argument, pass yours directly, no need for a loop.

Array
(
    [0] => tbFrench
    [1] => eaItaly
    [2] => discount
    [3] => kkMM
    [4] => NbndA
    [5] => fcMNSS
)

正则表达式说明：

\d+ — matches a digit (equal to [0-9])
+ Quantifier — Matches between one and unlimited times, as many times as possible, giving back as needed (greedy)
$ — asserts position at the end of a line

Answer 5

使用rtrim有一个快速窍门。

<?php

 $conn = mysqli_connect("localhost", "root", "", "channels");

if(isset($_POST['channel_name']) && $_POST['channel_name'] != "") {
   $dir = UUID();
   // I think channelname is an error as well.
   $channelname = $_POST['channel_name'];

   mkdir($dir, 0777, true);

   // I know there may be a syntax error in $index   
   $index = fopen($dir. "/index.php", "w");
   fclose($index);
   copy("index.php",$index);

   // Insert values into table
   $q = "INSERT INTO channels (dir, name) VALUES ($dir, $channelname)";
   $query = mysqli_query($conn, $q);
   if($query == true) {
   echo "your channel has been created";
   } else {
   echo "there was an error";
   };
 };

?>

第二个参数是使用2个点“ ..”的范围。

您完成了！！！

如果PHP中最后一个字符包含数字，则从字符串中删除最后一个字符

5 个答案: