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  1. Preventing Cron Job Collision
    7 months ago by spirit
    Prevents jobs to collide if they take longer to run than the frequency itself
    1. $fp = fopen('/tmp/lock.txt', 'r+'); 
    2.  
    3. if(!flock($fp, LOCK_EX | LOCK_NB)) { 
    4.    echo 'Unable to obtain lock'; 
    5.    exit(-1); 
    6. } 
    7.    
    8. /* ... */ 
    9.  
    10. fclose($fp);
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