分享php中幾個字符函數小結

下面小結PHP中的幾個字符函數， 網站推廣小結一下：

1）ucfirst
   將首字母變大寫，好比
  $string = "this is my web development blog";

echo ucfirst($string);

// Output: This is my web development blog

2) lcfirst,將首字母變小寫
   $string = "This is my Web Development Blog";

echo lcfirst($string);

// Output: this is my Web Development Blog

3）strtoupper,將整個字符串變大寫
   $string = "this is my web development blog";

echo strtoupper($string);

// Output: THIS IS MY WEB DEVELOPMENT BLOG

4） strtoplower，將整個字符串變小寫
   $string = "tHiS is mY WeB DevElOpMenT bLoG";

echo strtolower($string);

// Output: this is my web development blog

5）ucwords(),能夠將句子中每一個單詞的第一個字母變大寫，好比
   $string = "this is my web development blog";

echo ucwords($string);

// Output: This Is My Web Development Blog 網站推廣  （fblww-0118）