#file_get_contents

Các hàm xử lý file trong php

Trong phần trước, mình đã trình bày các hàm kiểm tra file có tồn tại, cũng như lấy những thông tin cần thiết của file trên server và quyền đọc, ghi và thực thi với file, ở phần này, mình sẽ giới thiệu về các hàm sử dụng trong sử lý file như đọc, ghi, xóa, đổi tên… và nhiều hàm khác. Xem toàn bộ chuyên đề: Chuyên đề xử lý file trong PHP Tạo file và ghi file Hàm này sẽ tạo một file ứng với path…

If you are using file_get_contents you might want to check out PHP Simple HTML DOM Parser

PHP Simple HTML DOM Parser is a great tool to easily process HTML from remote sites.  The HTML is returned so that it can be easily searched and iterated, this is great for scraping sites.  I didn’t write the code, but you can download it here and find some simple documentation: http://simplehtmldom.sourceforge.net/ Usage is really simple, just include the file: find(‘title’) as $e) { echo…

get longitude and latitude from an address with PHP and Google Maps API

Getting longitude and latitude from an address used to be a fairly complex task a few years ago,…

I'm starting to get into PHP since my new job uses Expression Engine running on PHP. Yesterday one of the devs ran into something very interesting; file_get_contents was not returning anything when we pointed at our own site, but pointing at some other public site (google.com in our test case) worked fine.

file_get_contents($url);

Playing around and looking for other approaches I also tried to open using the file function:

file($url);

No dice. Using some error trapping and Fiddler, it appeared that we weren't even getting any type of response (not even a 403 or 500). Turns out that we needed to use our internal IP address; once we did that it worked, both methods. I have to admit I'm still unsure as to why, and want to dig into this some more to find out. My current guess is that there's some type of configuration setting on our servers that was actively preventing the DNS look-up. But that's just a guess.

Oh, and the other bit I learned was that to suppress error messages in PHP you put the @ symbol in front of the function; then you can control the error trapping.

@file_get_contents($url); if (strpos($http_response_header[0], "200")) { echo "SUCCESS"; } else if (strpos($http_response_header[0], "400")) { echo "400"; } else { echo "FAILED"; }

If anyone can point me at the specific reasons for why domain lookup would be disabled, I'd love to learn about it.

Anyways, today I'm back to what I know - HTML5 CORS.