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Get first key in a (possibly) associative array?
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2019 Update
Starting from PHP 7.3, there is a new built in function called array_key_first() which will retrieve the first key from the given array without resetting the internal pointer. Check out the documentation for more info.
You can use reset...
What is an .inc and why use it?
I often see examples in PHP that include.inc files. What is the meaning of .inc? What it is used for? What are the disadvantages and advantages of using it?
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LEGO EV3 机器人按键控制
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这是一...
PHP - find entry by object property from an array of objects
...tion and subsequent answers for more information on the latter - Reference PHP array by multiple indexes
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How do you remove an array element in a foreach loop?
... use($found_tag){
return $e != $found_tag['name'];
});
As the php documentation reads:
As foreach relies on the internal array pointer in PHP 5, changing it within the loop may lead to unexpected behavior.
In PHP 7, foreach does not use the internal array pointer.
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PHP json_decode() returns NULL with valid JSON?
... On my server, it doesn't. And I can't call json_last_error() because it's PHP 5.2.9. That function appears on PHP 5.3.0.
– Joel A. Villarreal Bertoldi
Mar 9 '10 at 15:54
1
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Determining Referer in PHP
...nd(), TRUE);
$_SESSION['token'] = $token;
$url = "http://example.com/index.php?token={$token}";
Then the index.php will look like this:
if(empty($_GET['token']) || $_GET['token'] !== $_SESSION['token'])
{
show_404();
}
//Continue with the rest of code
I do know of secure sites that do the...
Simplest way to detect a mobile device in PHP
...est way to tell if a user is using a mobile device to browse my site using PHP?
15 Answers
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json_encode sparse PHP array as JSON array, not JSON object
I have the following array in PHP:
4 Answers
4
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What is the difference between self::$bar and static::$bar in PHP?
...atic, you're invoking a feature called late static bindings (introduced in PHP 5.3).
In the above scenario, using self will result in Foo::$bar(1234).
And using static will result in Bar::$bar (4321) because with static, the interpreter takes takes into account the redeclaration within the Bar clas...