ucfirst()

(PHP 4, PHP 5, PHP 7)

将字符串的首字母转换为大写

说明

将$str的首字符（如果首字符是字母）转换为大写字母，并返回这个字符串。

注意字母的定义取决于当前区域设定。例如，在默认的“C”区域，字符 umlaut-a（ä）将不会被转换。

参数

输入字符串。

返回值

返回结果字符串。

范例

Example #1ucfirst()范例

参见

• lcfirst() 使一个字符串的第一个字符小写
• strtolower() 将字符串转化为小写
• strtoupper() 将字符串转化为大写
• ucwords() 将字符串中每个单词的首字母转换为大写

Simple multi-bytes ucfirst(): 

A proper Turkish solution; 

I believe that mb_ucfirst will be soon added in PHP, but for now this could be useful

it also check is mb support enabled or not

This is what I use for converting strings to sentence case: 

Here's a function to capitalize segments of a name, and put the rest into lower case. You can pass the characters you want to use as delimiters.
i.e. 

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