1回答

• 

  qq_馨儿_2

  2017-06-17 10:05:14

  已采纳

  用strtoupper函数

  <?php

  $string = "hoPe YOU a day";

  $lower = strtolower(substr ($string,1,13));

  $upper = strtoupper(substr ($string,0,1));

  echo $upper.$lower;

  ?>

  
  

  1 0

  qq_寺之腊...

  谢谢你的帮助！谢谢!

  2017-06-17 21:30:57

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