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PHP的函数前加上“@”的作用 - PHP - 清泛IT论坛，有思想、有深度
@是PHP提供的错误信息屏蔽的专用符号。
比如在一个函数前使用@
@mysql_query 不会出现Warning，
而原来mysql_query 在遇到错误时会在页面上访提示Warning。
php安装gd库扩展（无需源码安装） - 更多技术 - 清泛网 - 专注C/C++及内核技术
php安装gd库扩展（无需源码安装）php_gd_installgd是php图片处理库，网上各种源码安装，非常复杂，其实很简单，无需源码编译。apt install php-gd重启apache生效：systemctl restart apache2gd是php图片处理库，网上各种源码安装，非常复杂，其...
Detecting iOS / Android Operating system
... @feeela sometimes the feature is something like being able to install apks, which isn't possible to detect.
– Daniel Lubarov
Mar 7 '16 at 21:11
2
...
parsing JSONP $http.jsonp() response in angular.js
...
UPDATE: since Angular 1.6
You can no longer use the JSON_CALLBACK string as a placeholder for
specifying where the callback parameter value should go
You must now define the callback like so:
$http.jsonp('some/trusted/url', {jsonpCallbackParam: 'callback'})
Change/access/decla...
Benefits of using the conditional ?: (ternary) operator
...
I would basically recommend using it only when the resulting statement is extremely short and represents a significant increase in conciseness over the if/else equivalent without sacrificing readability.
Good example:
int result = Check...
Removing array item by value
...
The most powerful solution would be using array_filter, which allows you to define your own filtering function.
But some might say it's a bit overkill, in your situation...
A simple foreach loop to go trough the array and remove the item you don't want should be enough.
Something lik...
致PHP路上的“年轻人” - 杂谈 - 清泛网 - 专注C/C++及内核技术
致PHP路上的“年轻人”今晚在公司，又与一位刚做PHP工作一年的朋友聊了甚久。他与他们有一样的问题，比较迷茫。而我当年也有他们的困惑。虽然自己也还年轻，但作...今晚在公司，又与一位刚做PHP工作一年的朋友聊了甚久。...
Test if number is odd or even
...
While all of the answers are good and correct, simple solution in one line is:
$check = 9;
either:
echo ($check & 1 ? 'Odd' : 'Even');
or:
echo ($check % 2 ? 'Odd' : 'Even');
works very well.
...
Copy Notepad++ text with formatting?
... Settings > Shortcut Mapper > Plugin Commands > Copy all Formats to clipboard. > CTRL+SHIFT+C --> Happy formatting !
– The Beast
Oct 29 '16 at 18:38
...
How to convert a string to lower case in Bash?
...ous ways:
POSIX standard
tr
$ echo "$a" | tr '[:upper:]' '[:lower:]'
hi all
AWK
$ echo "$a" | awk '{print tolower($0)}'
hi all
Non-POSIX
You may run into portability issues with the following examples:
Bash 4.0
$ echo "${a,,}"
hi all
sed
$ echo "$a" | sed -e 's/\(.*\)/\L\1/'
hi all
# t...