$re = '/("[^\n]*"(?!\\\\))|(//[^\n]*$|/(?!\\\\)\*[\s\S]*?\*(?!\\\\)/)/m';
$str = '#include <stdio.h>
int main(int argc, char** argv)
{
// this comment will be removed
if (argc > 1) {
printf("Too many arguments.\\n"); // this too will be removed
return 1;
}
printf("Please vist http://this.will.not.be.removed.com\\n");
printf("/* This will stay */\\n");
printf("\\"/* This will stay too */\\"\\n");
printf("//and so will this\\\\");
// but not this
printf("just \\"ano//ther\\" test.");
return 0;
}
/*
this shall disappear
*/
#include <string>
int main(int argc, char** argv)
{
string foo = ""/*remove that!**/;
// Remove /* this
int butNotThis = 42;
// But do */ remove this
int bar = 4 /*remove this*/* 3; // but don\'t remove that 3. */
return 0;//just a comment
}/*end of the file has been reached.*/';
preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0);
// Print the entire match result
var_dump($matches);
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for PHP, please visit: http://php.net/manual/en/ref.pcre.php