PHP trim() 函數(shù)
定義和用法
trim() 函數(shù)從字符串的兩端刪除空白字符和其他預(yù)定義字符。
語(yǔ)法
trim(string,charlist)
| 參數(shù) | 描述 |
|---|---|
| string | 必需。規(guī)定要檢查的字符串。 |
| charlist |
可選。規(guī)定要轉(zhuǎn)換的字符串。如果省略該參數(shù)，則刪除以下所有字符：
|
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>