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What is the most accurate way to retrieve a user's correct IP address in PHP?
... fully-validated, and fully-packaged, version of @AlixAxel's answer:
<?php
/* Get the 'best known' client IP. */
if (!function_exists('getClientIP'))
{
function getClientIP()
{
if (isset($_SERVER["HTTP_CF_CONNECTING_IP"]))
{
...
Converting an integer to a string in PHP
Is there a way to convert an integer to a string in PHP?
14 Answers
14
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Fastest hash for non-cryptographic uses?
...
CRC32 is pretty fast and there's a function for it: http://www.php.net/manual/en/function.crc32.php
But you should be aware that CRC32 will have more collisions than MD5 or even SHA-1 hashes, simply because of the reduced length (32 bits compared to 128 bits respectively 160 bits). But ...
Using braces with dynamic variable names in PHP
...
Overview
In PHP, you can just put an extra $ in front of a variable to make it a dynamic variable :
$$variableName = $value;
While I wouldn't recommend it, you could even chain this behavior :
$$$$$$$$DoNotTryThisAtHomeKids = $value;
Y...
How do I recursively delete a directory and its entire contents (files + sub dirs) in PHP?
...I delete a directory and its entire contents (files and subdirectories) in PHP?
21 Answers
...
php $_POST array empty upon form submission
I have a custom CMS i've built that works perfectly on my dev box (Ubuntu/PHP5+/MySQL5+).
27 Answers
...
Redirecting from HTTP to HTTPS with PHP
...
This is a good way to do it:
<?php
if (!(isset($_SERVER['HTTPS']) && ($_SERVER['HTTPS'] == 'on' ||
$_SERVER['HTTPS'] == 1) ||
isset($_SERVER['HTTP_X_FORWARDED_PROTO']) &&
$_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https'))
{
$...
How do I get a file extension in PHP?
... theirs is better because they have a built-in function to do that and not PHP (I am looking at Pythonistas right now :-)).
In fact, it does exist, but few people know it. Meet pathinfo():
$ext = pathinfo($filename, PATHINFO_EXTENSION);
This is fast and built-in. pathinfo() can give you other in...
How do I log errors and warnings into a file?
...ile, but to set up all of that within the script (not changing anything in php.ini)?
7 Answers
...
Multiple returns from a function
...
If only PHP had Perl's wantarray()
– Marc B
Aug 26 '10 at 22:22
8
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