String 函数
PHP 手册

ucfirst

(PHP 4, PHP 5)

ucfirstMake a string's first character uppercase

说明

string ucfirst ( string $str )

Returns a string with the first character of str capitalized, if that character is alphabetic.

Note that 'alphabetic' is determined by the current locale. For instance, in the default "C" locale characters such as umlaut-a (ä) will not be converted.

参数

str

The input string.

返回值

Returns the resulting string.

范例

Example #1 ucfirst() example

<?php
$foo 
'hello world!';
$foo ucfirst($foo);             // Hello world!

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

参见


String 函数
PHP 手册