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  1. #1
    SitePoint Enthusiast
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    Oct 2005
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    Avoid php "hanging" page

    Hello,
    I have a php page that the user enters some data in a textarea, and then this data is fed into a command line program. When the execution of the command line programm finishes, the results are stored in an output file that is created. The "results" php page then reads this file and the user views the results. My problem is that sometimes (depending on the amount of data inserted and, subsequently the size of the output file created by the command-line programm), the php results page crushes, outputting error like:

    Code:
    Fatal error: Allowed memory size of 16777216 bytes exhausted (tried to allocate 846269 bytes) in /results.php on line 125
    In this line of the script, I read the whole file into a string and then separate each result chunk by a separator (//) that the command line programm creates:

    Code:
     $res_handle= fopen($output_file, "r");
     $results = fread($res_handle, filesize($output_file));
     fclose($res_handle);
                        
     $separated_entries = explode ("//", $results);
    Then, foreach chunk, I output the results to the user. Is there something that I must configure in php so that it won't have memory problems? Or another way to slurp the total output file without exhausting the memory?

    thank you!

  2. #2
    Non-Member
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    Oct 2009
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    note fread() second parameter
    it may be not whole file size but reasonable amount of data


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