常用字符串函数_PHP

---

 //颠倒字串
 print("abcdefg  颠倒  ");
 print(strrev("abcdefg")."

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");

 //小写字串
 print("小写: ".strtolower("Hello World")."

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");

 //大写字串
 print("大写: ".strtoupper("Hello World")."

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");

 //去空格
 $text = "     whitespace      ";
 print("\"" . trim($text) . "\"");
?>

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