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String equality and deletion of variables in php

WBOY
Release： 2016-07-25 09:07:25
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  2. $a='11';
  3. $b=11;
  4. if($a===$b)
  5. {
  6. echo 'strict equality';
  7. }
  8. else if($ a==$b)
  9. {
  10. echo 'equal';
  11. }
  12. else
  13. {
  14. echo 'not equal';
  15. }
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The results are equal.

Here’s how to delete elements in an array:

Examples are as follows:

  2. $_POST=array("firstname"=>'f',"lastname"=>'j',"email"=>"fj@qq.com", "password"=>"123",'rpassword'=>"123");
  3. $user=$_POST;
  4. function deletearray($user)
  5. {
  6. foreach($user as $key => $value )
  7. {
  8. if($key=='firstname')
  9. {
  10. unset($user[$key]);
  11. }
  12. else
  13. {
  14. return true;
  15. }
  16. }
  17. }
  18. deletearray($user);
  19. print_r($user);
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Remarks: At first I couldn't delete firstname. I always thought it was an error with ==. Later I found out that an error occurred when calling the function. If you want to change the incoming array, you should pass in &$user. That is, pass in Only by inserting a reference can the result of the array be changed.



Related labels：
php中字符串判等及删除变量
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