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PHP: How to use array_filter() to filter array keys?
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PHP 5.6 introduced a third parameter to array_filter(), flag, that you can set to ARRAY_FILTER_USE_KEY to filter by key instead of value:
$my_array = ['foo' => 1, 'hello' => 'world'];
$allowed = ['foo', 'bar'];
$filte...
PHP global in functions
...alVariablesAreBad
How is testing the registry pattern or singleton hard in PHP?
Flaw: Brittle Global State & Singletons
static considered harmful
Why Singletons have no use in PHP
SOLID (object-oriented design)
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Link to “pin it” on pinterest without generating a button
...great in Wordpress!
<a href="//pinterest.com/pin/create/link/?url=<?php the_permalink();?>&description=<?php the_title();?>">Pin this</a>
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improve this answe...
How do I convert datetime to ISO 8601 in PHP
...mat(DateTime::ATOM); // Updated ISO8601
Procedural
For older versions of PHP, or if you are more comfortable with procedural code.
echo date(DATE_ISO8601, strtotime('2010-12-30 23:21:46'));
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AsyncProcedures异步过程扩展 · App Inventor 2 中文网
...数据处理
示例2：文件操作
常见问题
Q: 异步过程中如何更新UI？
Q: 如何处理异步过程的错误？
Q: 异步过程会阻塞应用吗？
Q: 如何控制异步过程的执行顺序？
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Overriding class constants vs properties
... and always refers to the class it is being executed in. If you are using php5.3+ you might try static::TEST as static:: is inheritance-aware.
The difference is that static:: uses "late static binding". Find more information here:
http://php.net/manual/en/language.oop5.late-static-bindings.php
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How can I detect if the user is on localhost in PHP?
...y web application is on the server it resides on? If I remember correctly, PHPMyAdmin does something like this for security reasons.
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Gradients in Internet Explorer 9
...s CSS3 gradient support. However, here is a nice workaround solution using PHP to return an SVG (vertical linear) gradient instead, which allows us to keep our design in our stylesheets.
<?php
$from_stop = isset($_GET['from']) ? $_GET['from'] : '000000';
$to_stop = isset($_GET['to']) ? $_GET['t...
Cookies on localhost with explicit domain
...ting it to "" or NULL or FALSE instead of "localhost" is not enough.
For PHP, see comments on http://php.net/manual/en/function.setcookie.php#73107.
If working with the Java Servlet API, don't call the cookie.setDomain("...") method at all.
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File upload progress bar with jQuery
...responseText);
}
});
});
html:
<form action="file-echo2.php" method="post" enctype="multipart/form-data">
<input type="file" name="myfile"><br>
<input type="submit" value="Upload File to Server">
</form>
<div class="progress">
<div ...