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  1. <?php
  2.  
  3. $sym_rx = "~(?:([^-'\"()*,.:…;?`\s]+)|([-'\"()*,.:…;?`]))(\s)*~u";
  4. $str = "'this' is Mary! (a dog - not a human)";
  5. echo preg_replace_callback($sym_rx, function ($m) {
  6. 	$ins = !empty($m[2]) ? $m[2] . "\\SYM" : $m[1] . "\\not SYM";
  7. 	return !empty($m[3]) ? $ins . $m[3] : $ins . " ";
  8. }, $str);
  9.  
Success #stdin #stdout 0s 82944KB
comments (?)
stdin 
Standard input is empty
stdout 
'\SYM this\not SYM '\SYM is\not SYM Mary!\not SYM (\SYM a\not SYM dog\not SYM -\SYM not\not SYM a\not SYM human\not SYM )\SYM
https://ideone.com/iVBON1
language:
PHP (php 7.3.5)
created:
8 years ago
visibility:
secret

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