JSON object max size?
ajax, apache, jquery, json, php
Solution
This is probably due to your server's configuration. Check php.ini for the setting `max_post_size` and ensure that it is sufficiently large to post your data. Also check your web server settings - Apache has a `LimitRequestBody` directive which could be causing your problem. Finally, check your web server and PHP error logs to see if the large post is triggering any errors.
Problem
Using jquery, I'm able to send json objects from client to server using ajax like this: ``` var strJSON = '{"event":[{ "dates":[ "2009-10-14","2009-10-15"], "teams":[ {"id":"0","country":"USA","state":"CA","name":"California Polytechnic State University","subteam":""}, {"id":"1","country":"USA","state":"CA","name":"California State University, Bakersfield","subteam":""}, {"id":"2","country":"USA","state":"CA","name":"California State University, Fresno","subteam":""}, {"id":"3","country":"USA","state":"CA","name":"California State University, Fullerton","subteam":""}] }]}'; $.ajax({ url: '../ajax/save_event', type: 'POST', data: { data : strJSON }, dataType: 'json', timeout: 8000, cache: false }); ``` It works well. But if the JSON string gets much bigger (not sure the exact size, but somewhere around 5x bigger), the $_POST data received by the server is empty. Anybody know why? I'm using Apache/PHP/jquery. It happens from both IE and Firefox. Is there a config setting somewhere I need to adjust? Here's an example of a string that fails to make it through: ``` {"events":[{"dates":["2009-10-10","2009-10-11","2009-10-12"],"divisions":[{"level":"Collegiate","name":"Varsity","subdivision":"Division I","rounds":[],"teams":[{"id":"0","country":"USA","state":"CA","name":"California Polytechnic State University","subteam":""},{"id":"1","country":"USA","state":"CA","name":"California State University, Bakersfield","subteam":""},{"id":"2","country":"USA","state":"CA","name":"California State University, Fresno","subteam":""},{"id":"3","country":"USA","state":"CA","name":"California State University, Fullerton","subteam":""},{"id":"4","country":"USA","state":"CA","name":"Stanford University","subteam":""},{"id":"5","country":"USA","state":"CA","name":"University of California, Davis","subteam":""},{"id":"6","country":"USA","state":"CA","name":"San Francisco State University","subteam":""},{"id":"7","country":"USA","state":"CA","name":"Lassen Community College","subteam":""},{"id":"8","country":"USA","state":"CA","name":"Menlo College","subteam":""},{"id":"9","country":"USA","state":"CA","name":"Fresno Pacific University","subteam":""},{"id":"10","country":"USA","state":"CA","name":"Bakersfield","subteam":""},{"id":"11","country":"USA","state":"CA","name":"Buchanan","subteam":""},{"id":"12","country":"USA","state":"CA","name":"Campolindo-Moraga","subteam":""},{"id":"13","country":"USA","state":"CA","name":"Fremont-Sunnyvale","subteam":""},{"id":"14","country":"USA","state":"CA","name":"Ponderosa-Shingle Springs","subteam":""},{"id":"15","country":"USA","state":"CA","name":"West Covina","subteam":""},{"id":"16","country":"USA","state":"CA","name":"Gilroy","subteam":""},{"id":"17","country":"USA","state":"CA","name":"San José State University","subteam":""},{"id":"18","country":"USA","state":"CA","name":"University of California, Los Angeles","subteam":""},{"id":"19","country":"USA","state":"CA","name":"Sierra College","subteam":""},{"id":"20","country":"USA","state":"CA","name":"Selma","subteam":""},{"id":"21","country":"USA","state":"CA","name":"Liberty","subteam":""}],}]}]} ``` It's created using json.org's "stringify": ``` var strJSON = JSON.stringify(oEvent); ``` EDIT: Investigating further, I changed the dataType to "text" and tried sending a long string of numbers. It works up until ~3500 characters then chokes (and when I say "choke" I mean that the request arrives at the server with a null $_POST.) My PHP post_max_size is 64M, so that's not it. Someone suggested using Apache's "LimitRequestBody" which wasn't in httpd.conf, so I added "LimitRequestBody 0" to it and rebooted Apache. That didn't help either. Any other suggestions???