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PHP cannot generate a temporary file similar to .pid that identifies the process

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WBOYOriginal
2016-07-25 08:57:421037browse
  2. $filename = "/tmp/test_php.pid";
  3. $fp = fopen($filename, 'w');
  4. //unset($fp);
  5. unlink($filename );
  6. sleep(6);
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2, C program code

  3. #include

  4. int main()

  5. {
  6. char *filename = "/tmp/test_c.pid";
  7. FILE *fp;
  8. fp = fopen(filename, "w");
  9. unlink(filename);
  10. sleep(6);
  11. }

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