Source Code : Locking Files with flock( )

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Locking Files with flock( )

 
<?
    $fp = fopen( $filename,"w"); // open it for WRITING ("w")
    if (flock($fp, LOCK_EX)) {
            // do your file writes here
            flock($fp, LOCK_UN); // unlock the file
    } else {
            // flock( ) returned false, no lock obtained
            print "Could not lock $filename!
";
    }
?>
  
  

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