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， 小結一下：
 
1）ucfirst
   將首字母變大寫，比如
  $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(),可以將句子中每個單詞的第一個字母變大寫，比如
   $string = "this is my web development blog";
 
echo ucwords($string);
 
// Output: This Is My Web Development Blog