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How do I convert a PDF document to a preview image in PHP? [closed]
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You need ImageMagick and GhostScript
<?php
$im = new imagick('file.pdf[0]');
$im->setImageFormat('jpg');
header('Content-Type: image/jpeg');
echo $im;
?>
The [0] means page 1.
sha...
Wi-Fi 是什么的缩写 - 程序人生、谈天论地 - 清泛IT论坛，有思想、有深度
...试产品是否符合标准，导致 802.11 产品间的互通频频出现问题，而联盟的成立就是为了填补这一空缺。联盟还将推广符合 802.11 标准的无线网络技术作为己任，因此他们认为需要一个朗朗上口的名字来代替拗口的专业术语（呃…...
How to get last key in an array?
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PHP's built-in functions were built by extreme nerds. Do not try to recreate those functions. The odds are that you make something far slower than the original. Unless you are some sort of evil wizard, of couse.
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Is == in PHP a case-sensitive string comparison?
I was unable to find this on php.net. Is the double equal sign ( == ) case sensitive when used to compare strings in PHP?
7...
Convert a series of parent-child relationships into a hierarchical tree?
...ay data has been encapsulated into TreeNode.
The full code example:
<?php
namespace My;
$tree = array('H' => 'G', 'F' => 'G', 'G' => 'D', 'E' => 'D', 'A' => 'E', 'B' => 'C', 'C' => 'E', 'D' => null);
// add children to parents
$flat = array(); # temporary array
foreach...
How to prevent caching of my Javascript file? [duplicate]
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<script src="test.js?random=<?php echo uniqid(); ?>"></script>
EDIT: Or you could use the file modification time so that it's cached on the client.
<script src="test.js?random=<?php echo filemtime('test.js'); ?>"></script>...
How to Debug Variables in Smarty like in PHP var_dump()
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You can use {php} tags
Method 1 (won't work in Smarty 3.1 or later):
{php}
$var =
$this->get_template_vars('var');
var_dump($var);
{/php}
Method 2:
{$var|@print_r}
Method 3:
{$var|@var_dump}
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What's quicker and better to determine if an array key exists in PHP?
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@FrancescoPasa Well, "search for the keys" is what PHP documentation says. Other than that, I can't tell if "search" to them means something completely different to what it means to me.
– Rain
Apr 22 at 6:09
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C/C++中退出线程的几种方法 - C/C++ - 清泛网 - 专注C/C++及内核技术
...的线程堆栈上的值，那么其他的线程就会出现访问违规的问题。如果将已经撤消的线程的堆栈留在内存中，那么其他线程就可以继续很好地运行。
此外，当线程终止运行时， DLL通常接收通知。如果使用TerminateThread 强迫线程终...
PDO MySQL: Use PDO::ATTR_EMULATE_PREPARES or not?
...) can use prepared statements in the query cache. So your version of MySQL+PHP can use prepared statements with the query cache. However, make careful note of the caveats for caching query results in the MySQL documentation. There are many kinds of queries which cannot be cached or which are useless...