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                ## ucfirst 將字符串的首字母轉換為大寫 將 str 的首字符(如果首字符是字母)轉換為大寫字母,并返回這個字符串。 ~~~ string ucfirst ( string $str ) ~~~ **eg** ~~~ <?php $foo = 'hello world!'; $foo = ucfirst($foo); // Hello world! $bar = 'HELLO WORLD!'; $bar = ucfirst($bar); // HELLO WORLD! $bar = ucfirst(strtolower($bar)); // Hello world! ?> ~~~ ## lcfirst使一個字符串的第一個字符小寫 **eg** ~~~ <?php $foo = 'HelloWorld'; $foo = lcfirst($foo); // helloWorld $bar = 'HELLO WORLD!'; $bar = lcfirst($bar); // hELLO WORLD! $bar = lcfirst(strtoupper($bar)); // hELLO WORLD! ?> ~~~
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