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PHP英文字母大小写转换函数小结_PHP

WBOY
WBOYOriginal
2016-06-01 11:53:091541browse

每个单词的首字母转换为大写:ucwords()
复制代码 代码如下:$foo = 'hello world!';
$foo = ucwords($foo);             // Hello World!

$bar = 'HELLO WORLD!';
$bar = ucwords($bar);             // HELLO WORLD!
$bar = ucwords(strtolower($bar)); // Hello World!
?>

第一个单词首字母变大写:ucfirst()
复制代码 代码如下:$foo = 'hello world!';
$foo = ucfirst($foo);             // Hello world!

$bar = 'HELLO WORLD!';
$bar = ucfirst($bar);             // HELLO WORLD!
$bar = ucfirst(strtolower($bar)); // Hello world!
?>

第一个单词首字母变小写:lcfirst()
复制代码 代码如下:$foo = 'HelloWorld';
$foo = lcfirst($foo);             // helloWorld

$bar = 'HELLO WORLD!';
$bar = lcfirst($bar);             // hELLO WORLD!
$bar = lcfirst(strtoupper($bar)); // hELLO WORLD!
?>

所有字母变大写:strtoupper()
所有字母变小写:strtolower()

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