PHP trim() 函数
PHP String 函数
定义和用法
trim() 函数从字符串的两端删除空白字符和其他预定义字符。
语法
trim(string,charlist)
| 参数 | 描述 |
|---|---|
| string | 必需。规定要检查的字符串。 | /tr>
| charlist |
可选。规定要转换的字符串。如果省略该参数，则删除以下所有字符：
|
例子
例子 1
<html>
<body>
<?php
$str = " Hello World! ";
echo "Without trim: " . $str;
echo "<br />";
echo "With trim: " . trim($str);
?>
<body>
<html>
<body>
<?php
$str = " Hello World! ";
echo "Without trim: " . $str;
echo "<br />";
echo "With trim: " . trim($str);
?>
<body>
<html>
输出：
Without trim: Hello World!
With trim: Hello World!
With trim: Hello World!
HTML 源码：
<html>
<body>
Without trim: Hello World! <br />With trim: Hello World!
</body>
</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);
?>
$str = "\r\nHello World!\r\n";
echo "Without trim: " . $str;
echo "<br />";
echo "With trim: " . trim($str);
?>
输出：
Without trim: Hello World!
With trim: Hello World!
With trim: Hello World!
HTML 源码：
<html>
<body>
Without trim:
Hello World!
<br />With trim: Hello World!
</body>
</html>
<body>
Without trim:
Hello World!
<br />With trim: Hello World!
</body>
</html>
PHP String 函数