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  1. <?php
  2.  
  3. if (preg_match('~^[^\s#+&\'"\\\\]+(?:\s[^\s#+&\'"\\\\]+)*$~', "")) {
  4. 	echo "Matched ''\n";
  5. }
  6. if (preg_match('~^[^\s#+&\'"\\\\]+(?:\s[^\s#+&\'"\\\\]+)*$~', " ")) {
  7. 	echo "Matched ' '\n";
  8. }
  9. if (preg_match('~^[^\s#+&\'"\\\\]+(?:\s[^\s#+&\'"\\\\]+)*$~', " a")) {
  10. 	echo "Matched ' a'\n";
  11. }
  12. if (preg_match('~^[^\s#+&\'"\\\\]+(?:\s[^\s#+&\'"\\\\]+)*$~', "a b")) {
  13. 	echo "Matched 'a b'\n";
  14. }
  15. if (preg_match('~^[^\s#+&\'"\\\\]+(?:\s[^\s#+&\'"\\\\]+)*$~', "a  b")) {
  16. 	echo "Matched 'a  b'\n";
  17. }
Success #stdin #stdout 0.03s 52480KB
comments (?)
stdin 
Standard input is empty
stdout 
Matched 'a b'
https://ideone.com/SEzCM2
language:
PHP (php 7.3.5)
created:
7 years ago
visibility:
secret

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