linux - kill function after specific time in php? -


i have 5 exec() function in script.i want if function not give response in given time function kill , next function starts execution.

 <?php     exec("timeout 5 /usr/local/bin/wrun 'uptime;ps -elf|grep httpd|wc -l;free -m;mpstat'",$uptime);      exec("timeout 5 /usr/local/bin/trun 'uptime;ps -elf|grep httpd|wc -l;free -m;mpstat'",$uptime);      exec("timeout 5 /usr/local/bin/drun 'uptime;ps -elf|grep httpd|wc -l;free -m;mpstat'",$uptime);   ?>

in timeout argument not working.please correct or gives alternative method.

create bash script caller.sh , execute via exec. command automatically killed after 5 seconds.

caller.sh

#!/bin/sh /usr/local/bin/wrun 'uptime;ps -elf|grep httpd|wc -l;free -m;mpstat' & sleep 5 kill $! 2>/dev/null && echo "killed command on time out"

php 

exec("caller.sh",$uptime);

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