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How can one check to see if a remote file exists using PHP?
.../favicon.ico");
curl_setopt($ch, CURLOPT_NOBODY, true);
curl_exec($ch);
$retcode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
// $retcode >= 400 -> not found, $retcode = 200, found.
curl_close($ch);
Anyway, you only save the cost of the HTTP transfer, not the TCP connection establishment and cl...
糯米推全景地图 让竞争对手们如何接招？ - 资讯 - 清泛网 - 专注C/C++及内核技术
...尾巴，创业的热情还异常火爆。那时，我就思考这样一个问题：O2O，尤其是餐饮类O2O，可以凭借一时的补贴吸引顾客，但补贴之后呢？信任感才是最重要的。如何建立信任感，将是O2O未来面临的一大挑战。
2015年7月，正值厨师...
国务院常务会议“大数据” - 资讯 - 清泛网 - 专注C/C++及内核技术
...策措施中还存在工作不协调、落实不到位、工作进度慢等问题，也存在欺上瞒下、弄虚作假和工作不作为等现象。
除了削权放权以外，国务院常务会议随后在简政放权的配套改革和监管方面也做出了部署。例如，本月15日的国...
Best way to use PHP to encrypt and decrypt passwords? [duplicate]
...rmation for my users on my website, aka rapidshare username and passwords, etc... I want to keep information secure, but I know that if I hash their information, I can't retrieve it for later use.
...
move_uploaded_file gives “failed to open stream: Permission denied” error
... of changed the servers php type from fast_CGI, CGI to Apache_mod as plesk etc.. can continue with original user's permissions not apache. This fixed my issues.
– elliotrock
Oct 16 '14 at 4:31
...
How to check for null in Twig?
...ow) to check whether a variable is empty (null, false, empty string/array, etc):
{% if var|default is empty %}
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How do I obtain crash-data from my Android application?
... just Crash reporting but this is not the right place to talk new features etc.
– PanosJee
Sep 9 '13 at 10:20
Tried it...
What does $1 [QSA,L] mean in my .htaccess file?
...This will capture requests for files like version,
release, and README.md, etc. which should be
treated either as endpoints, if defined (as in the
case of /release), or as "not found."
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impro...
What is the difference between statically typed and dynamically typed languages?
...he type is associated with run-time values, and not named variables/fields/etc. This means that you as a programmer can write a little quicker because you do not have to specify types every time (unless using a statically-typed language with type inference).
Examples: Perl, Ruby, Python, PHP, Java...
Error 908: Permission RECEIVE_SMS has been denied. - App Inventor 2 中...
...到错误908（权限接收短信）的讨论。一位用户遇到了这个问题，并询问是否有人知道如何解决。其他用户提供了一些可能的解决方案，包括检查应用程序权限设置、确保手机上的权限设置正确、重新编译应用程序等。有人建议检...