توابع rtrim() در PHP
مثال
حذف کاراکترها از سمت راست رشته:
<?php $str = "Hello World!"; echo $str . "<br>"; echo rtrim($str,"World!"); ?>
تعریف و استفاده
توابع rtrim() حذف کاراکترهای خالی یا کاراکترهای پیشتعریف شده در سمت راست رشته را انجام میدهد.
توابع مرتبط:
زبان
rtrim(string,charlist)
Parameter | Description |
---|---|
string | Required. Specify the string to be checked. |
charlist |
Optional. Specify which characters to remove from the string. If omitted, the following characters are removed:
|
Technical Details
Return Value: | Return the modified string. |
PHP Version: | 4+ |
Update Log: | Added in PHP 4.1 charlist Parameter. |
More Examples
Example 1
Remove spaces from the right of the string:
<?php $str = "Hello World! "; echo "Without using rtrim: " . $str; echo "<br>"; echo "Use rtrim: " . rtrim($str); ?>
The HTML output of the above code is as follows (view source code):
<!DOCTYPE html> <html> <body> Without using rtrim: Hello World! <br>Use rtrim: Hello World! </body> </html>
The browser output of the above code is as follows:
Without using rtrim: Hello World! Use rtrim: Hello World!
Example 2
Remove newline characters (\n) from the right of the string:
<?php $str = "Hello World!\n\n\n"; echo "Without using rtrim: " . $str; echo "<br>"; echo "Use rtrim: " . rtrim($str); ?>
The HTML output of the above code is as follows (view source code):
<!DOCTYPE html> <html> <body> Without using rtrim: Hello World! <br>Use rtrim: Hello World! </body> </html>
The browser output of the above code is as follows:
Without using rtrim: Hello World! Use rtrim: Hello World!