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  1. <?php
  2.  
  3. $data = <<<DATA
  4. "foo"
  5. 'foo'
  6. abc "foo"
  7. foo "bar", "baz"
  8. abc 'foo "bar" baz'
  9. DATA;
  10.  
  11. $regex = "~
  12. 		'[^']*'(*SKIP)(*FAIL) # match everything between single quotes and fail 
  13. 		|                     # or
  14. 		\"([^\"]*)\"		  # match double quotes
  15. 		~x";
  16.  
  17. $data = preg_replace($regex, "'$1'", $data);
  18.  
  19. echo $data;
  20. ?>
Success #stdin #stdout 0.01s 52488KB
comments ()
stdin
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Standard input is empty
stdout
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'foo'
'foo'
abc 'foo'
foo 'bar', 'baz'
abc 'foo "bar" baz'
https://ideone.com/JfUSRj
language:
PHP (php 7.3.5)
created:
8 years ago
visibility:
public

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