PHP regex-从字符串中删除特殊字符

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This will remove all non-ascii characters / special characters from a string.
  1. //Remove from a single line string
  2. $output = "Likening ‘not-critical’ with";
  3. $output = preg_replace('/[^(x20-x7F)]*/','', $output);
  4. echo $output;
  5.  
  6. //Remove from a multi-line string
  7. $output = "Likening ‘not-critical’ with 
 Likening ‘not-critical’ with 
 Likening ‘not-critical’ with. ' ! -.";
  8. $output = preg_replace('/[^(x20-x7F)x0Ax0D]*/','', $output);
  9. echo $output;

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