PHP trim() 函數 · W3School PHP 參考手冊

# PHP trim() 函數 ## 定義和用法 trim() 函數從字符串的兩端刪除空白字符和其他預定義字符。 ### 語法 ``` trim(string,charlist) ``` | 參數 | 描述 | | --- | --- | | string | 必需。規定要檢查的字符串。 | | charlist | 可選。規定要轉換的字符串。如果省略該參數，則刪除以下所有字符： "`\0`" - NULL "`\t`" - tab "`\n`" - new line "`\x0B`" - 縱向列表符 "`\r`" - 回車 "` `" - 普通空白字符 | ## 例子 ### 例子 1 ``` <html> <body> <?php $str = " Hello World! "; echo "Without trim: " . $str; echo "<br />"; echo "With trim: " . trim($str); ?> <body> <html> ``` 輸出： ``` Without trim: Hello World! With trim: Hello World! ``` HTML 源碼： ``` <html> <body> Without trim: Hello World! <br />With trim: Hello World! </body> </html> ``` ### 例子 2 ``` <?php $str = "\r\nHello World!\r\n"; echo "Without trim: " . $str; echo "<br />"; echo "With trim: " . trim($str); ?> ``` 輸出： ``` Without trim: Hello World! With trim: Hello World! ``` HTML 源碼： ``` <html> <body> Without trim: Hello World! <br />With trim: Hello World! </body> </html> ```