Question 41046 in PHP Question posted in
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PHP memory limit detection

My questions is how I can detect real memory limit on hosting? The php.ini settings do not always represent the true limits, for example, memory_limit of 512MB, the script might fail at 128MB, same for max_execution time.

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  1. 0

    you can not check the memory limit of the server using php you can just check the limit which is set by the server admin in php.ini file

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  2. 0

    If PHP exec commands are not blocked you could run a shell command like

    $freeram_r = explode("n", shell_exec("/usr/bin/free"));

    and parse the result. Or directly for the parameter of your choice, e.g. get the real Gigabytes available from the /proc/meminfo output like

    $available = shell_exec('awk '/MemAvailable/ { printf "%.3f n", $2/1024/1024 }' /proc/meminfo');
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