apache - PHP script works in browser but times out as cron job -

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i wrote php script fetches rss feeds , stores them in database. if access script through browser, runs flawlessly (with admittedly 2 minute wait before outputs log), when runs part of cron job, produces 40% of output , dies out...

i looked around net , tried adding these 2 lines script:

ini_set('max_execution_time', 0); ini_set("memory_limit","256m");

still same problem. i'm sure it's settings issue because current server running script cron-job no problems, , php error log showing few warnings.

what's best way troubleshoot problem on ubuntu server?

update

i noticed if run php code straight command line, perfect execution, think it's cron job problem. noticed execution stops whenever wants add new data mysql database, guess narrows down possibilities..


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