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php dynamically creates functions at runtime

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WBOYOriginal
2016-07-25 08:43:31958browse

General language functions must be defined at runtime, and PHP supports dynamic creation of functions at runtime. The following is a simple example to create a function $a according to different conditions during exercise

  1. if (count($_POST) > 0) {
  2. $prepped = create_function('$a', 'return trim($_POST[$a]);');
  3. }
  4. elseif (count($_GET) > 0 ) {
  5. $prepped = create_function('$a', 'return strtoupper($_GET[$a]);');
  6. }
  7. else {
  8. $prepped = create_function('$a', 'return false;') ;
  9. }echo $prepped('file');
  10. ?>
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