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  1. <?php
  2. function extension1() {
  3. 	$pathinfo = pathinfo("http://w...content-available-to-author-only...k.com/test.php?somevar"); 
  4. 	$query = $pathinfo["extension"];
  5. 	if (strpos($query,"?") !== false) 
  6. 		return substr($query,0,strpos($query,"?")); 
  7. 	return $query;
  8. }
  9. function extension2() {
  10. 	$strs = explode(".", 'http://w...content-available-to-author-only...k.com/test.php?somevar');
  11. 	$extension = array_pop($strs);
  12. 	$pos = strpos($extension,"?");
  13. 	if ($pos)
  14. 		$extension = substr($extension,0,$pos);
  15. 	return $extension;
  16. }
  17.  
  18. function extension3() {
  19. 	$baseName = basename('http://w...content-available-to-author-only...k.com/test.php?somevar');
  20. 	$dotPosition = strpos($baseName,".");
  21. 	$extension = substr($baseName, $dotPosition+1, strpos($baseName, "?")-$dotPosition-1);
  22. 	return $extension;
  23. }
  24.  
  25. function extension4() {
  26. 	$strs = 'http://w...content-available-to-author-only...k.com/test.php?somevar';
  27. 	preg_match("/\.(php)(?=\?)/", $strs ,$mathes);
  28. 	return $mathes[1];
  29. }
  30.  
  31. function extension5() {
  32. 	$path = parse_url('http://w...content-available-to-author-only...k.com/test.php?somevar');
  33. 	$extension = substr($path["path"], strpos($path["path"], '.')+1);
  34. 	return $extension;
  35. }
  36.  
  37. var_dump(extension1());
  38. var_dump(extension2());
  39. var_dump(extension3());
  40. var_dump(extension4());
  41. var_dump(extension5());
Success #stdin #stdout 0.02s 52456KB
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Standard input is empty
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string(3) "php"
string(3) "php"
string(3) "php"
string(3) "php"
string(3) "php"
https://ideone.com/kGnLQc
取出该URL中包含的扩展名
language:
PHP (php 7.3.5)
created:
8 years ago
visibility:
public

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