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Double not (!!) operator in PHP
...for any true value (numbers other than zero, non-empty strings and arrays, etc.) you will get the boolean value TRUE, and for any false value (0, 0.0, NULL, empty strings or empty arrays) you will get the boolean value FALSE.
It is functionally equivalent to a cast to boolean:
return (bool)$row;
...
Interface or an Abstract Class: which one to use?
...ful, but can come in handy in some architectures.
– netcoder
Jun 16 '11 at 14:18
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How to prevent Browser cache for php site
...uery part of the URI for the linked file.
(Can be used for css, js, images etc.)
For development:
<link rel="stylesheet" href="style.css?<?php echo date('Y-m-d_H:i:s'); ?>">
For production (where caching is mostly a good thing):
<link rel="stylesheet" type="text/css" href="style.c...
How to force the browser to reload cached CSS/JS files?
...
@AlixAxel: No, browsers will re-fetch it when the parameter changes, but some public proxies won't cache files with url parameters, so the best practice is to include the version in the path. And the mod_rewrite overhead is miniscule compared to every other ...
十年磨一“饼” 一个70后连续创业者的心路历程 - 资讯 - 清泛网 - 专注C/C+...
...了赛百味亚洲总部的ALAN老师关于很多标准化和供应链的问题(他在新加坡亚洲总部负责产品开发及供应链管理).
接下来讲讲我们现在的团队：“菜鸟也有鹰的梦想”——
操心的货当家“狮子”，草根乐观的烹饪师“王储”，务...
Permission denied on accessing host directory in Docker
...s script is:
# update the uid
if [ -n "$opt_u" ]; then
OLD_UID=$(getent passwd "${opt_u}" | cut -f3 -d:)
NEW_UID=$(stat -c "%u" "$1")
if [ "$OLD_UID" != "$NEW_UID" ]; then
echo "Changing UID of $opt_u from $OLD_UID to $NEW_UID"
usermod -u "$NEW_UID" -o "$opt_u"
if [ -n "$opt_r" ];...
Make a link use POST instead of GET
...s of the <a> also for the button, to create rules for hover, visited etc. Otherwise it will of course do the job, but it will look ugly. With the other solutions you simply don't need to change any CSS, you just get an <a> element like all the other you already have. Of course pure HTML ...
How can I capture the result of var_dump to a string?
...ugging because you couldn't do a browser search for (int) or (string)` and etc. It also mangles alot of information into a small space, just try: var_export(''); var_export('\'');. And most importantly, get ready for PHP Fatal error: Nesting level too deep - recursive dependency? in C:\path\file.ph...
Sending HTML email using Python
... smtplib.SMTP('localhost')
s.starttls()
s.login(email_login,
email_passwd)
s.sendmail(msg['From'], [msg['To']], msg.as_string())
s.quit()
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Google Authenticator available as a public service?
...re is a specific implementation for your server software (PHP, Java, .NET, etc.)
But, specifically, you don't need an offsite service to handle this.
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