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将 PHP 中的文本输入限制为仅允许五 (5) 个单词

发布于 2024-09-28 02:12:35 字数 88 浏览 4 评论 0原文

我想知道如何使用 PHP 在文本输入中只允许五 (5) 个单词。

我知道我可以使用 strlen 函数进行字符计数，但我想知道如何对单词进行计数。

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月隐月明月朦胧 2024-10-05 02:12:35

你可以这样尝试：

$string = "this has way more than 5 words so we want to deny it ";

//edit: make sure only one space separates words if we want to get really robust: 
//(found this regex through a search and havent tested it)
$string  = preg_replace("/\\s+/", " ", $string);

//trim off beginning and end spaces;
$string = trim($string);

//get an array of the words
$wordArray = explode(" ", $string);

//get the word count
$wordCount = sizeof($wordArray);

//see if its too big
if($wordCount > 5) echo "Please make a shorter string";

应该可以:-)

You can try it like this:

$string = "this has way more than 5 words so we want to deny it ";

//edit: make sure only one space separates words if we want to get really robust: 
//(found this regex through a search and havent tested it)
$string  = preg_replace("/\\s+/", " ", $string);

//trim off beginning and end spaces;
$string = trim($string);

//get an array of the words
$wordArray = explode(" ", $string);

//get the word count
$wordCount = sizeof($wordArray);

//see if its too big
if($wordCount > 5) echo "Please make a shorter string";

should work :-)

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爱*していゐ 2024-10-05 02:12:35

如果你这样做；

substr_count($_POST['your text box'], ' ');

并将其限制为 4

If you do;

substr_count($_POST['your text box'], ' ');

And limit it to 4

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绳情 2024-10-05 02:12:35

如果 $input 是您的输入字符串，

$wordArray = explode(' ', $input);
if (count($wordArray) > 5)
  //do something; too many words

尽管我真的不知道您为什么要使用 php 进行输入验证。如果您只使用 javascript，则可以在表单提交之前让用户有机会更正输入。

If $input is your input string,

$wordArray = explode(' ', $input);
if (count($wordArray) > 5)
  //do something; too many words

Although I honestly don't know why you'd want to do your input validation with php. If you just use javascript, you can give the user a chance to correct the input before the form submits.

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无远思近则忧 2024-10-05 02:12:35

除了使用explode() 或substr_count() 的所有这些不错的解决方案之外，为什么不简单地使用PHP 的内置函数来计算字符串中的单词数。我知道函数名称对于此目的来说并不是特别直观，但是：

$wordCount = str_word_count($string);

将是我的建议。

请注意，当使用多字节字符集时，这不一定很有效。类似以下内容：

define("WORD_COUNT_MASK", "/\p{L}[\p{L}\p{Mn}\p{Pd}'\x{2019}]*/u");

function str_word_count_utf8($str)
{
    return preg_match_all(WORD_COUNT_MASK, $str, $matches);
}

在这种情况下，在 str_word_count() 上建议使用 手册页

Aside from all these nice solutions using explode() or substr_count(), why not simply use PHP's built-in function to count the number of words in a string. I know the function name isn't particularly intuitive for this purpose, but:

$wordCount = str_word_count($string);

would be my suggestion.

Note, this isn't necessarily quite as effective when using multibyte character sets. In that case, something like:

define("WORD_COUNT_MASK", "/\p{L}[\p{L}\p{Mn}\p{Pd}'\x{2019}]*/u");

function str_word_count_utf8($str)
{
    return preg_match_all(WORD_COUNT_MASK, $str, $matches);
}

is suggested on the str_word_count() manual page

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无声情话 2024-10-05 02:12:35

您必须执行两次，一次在客户端使用 JavaScript，然后在服务器端使用 PHP。

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不打扰别人 2024-10-05 02:12:35

在PHP中，使用split函数将其按空格分割。这样你就会得到一个数组中的单词。然后检查数组的长度。

$mytextboxcontent=$_GET["txtContent"];

$words = explode(" ", $mytextboxcontent);
$numberOfWords=count($words);

 if($numberOfWords>5)
 {
   echo "Only 5 words allowed";
 }
 else
 {
  //do whatever you want....
 }

我没有测试这个。希望这有效。我的机器上现在没有设置PHP环境。

In PHP, use split function to split it by space.So you will get the words in an array. Then check the length of the array.

$mytextboxcontent=$_GET["txtContent"];

$words = explode(" ", $mytextboxcontent);
$numberOfWords=count($words);

 if($numberOfWords>5)
 {
   echo "Only 5 words allowed";
 }
 else
 {
  //do whatever you want....
 }

I didn't test this.Hope this works. I don't have a PHP environment set up on my machine now.

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