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How to fix “Headers already sent” error in PHP
...eader are:
header / header_remove
session_start / session_regenerate_id
setcookie / setrawcookie
Output can be:
Unintentional:
Whitespace before <?php or after ?>
The UTF-8 Byte Order Mark specifically
Previous error messages or notices
Intentional:
print, echo and other functi...
Best way to test for a variable's existence in PHP; isset() is clearly broken
...ng them as though they were. However, since they can be iterated, counted, etc, a missing value is not the same as one whose value is null.
The answer in this case, is to use array_key_exists() instead of isset().
Since this is takes the array to check as a function argument, PHP will still raise ...
LINUX下用PHPIZE安装PHP GD扩展 - PHP - 清泛IT论坛，有思想、有深度
...ir --with-jpeg-dir --with-gd
sudo make
make install
sudo vi /app/php5/etc/php.ini //修改PHP配置文件
extension=gd.so //添加这一行，重启PHP服务
---------------------------------------
安装gd，加上参数重新编译php也可以解决。
http://bbs...
Algorithm to get the excel-like column name of a number
...recursive function (Based on zero indexed numbers, meaning 0 == A, 1 == B, etc)...
function getNameFromNumber($num) {
$numeric = $num % 26;
$letter = chr(65 + $numeric);
$num2 = intval($num / 26);
if ($num2 > 0) {
return getNameFromNumber($num2 - 1) . $letter;
} else ...
LINUX下用PHPIZE安装PHP GD扩展 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...ir --with-jpeg-dir --with-gd
sudo make
make install
sudo vi /app/php5/etc/php.ini //修改PHP配置文件
extension=gd.so //添加这一行，重启PHP服务
---------------------------------------
安装gd，加上参数重新编译php也可以解决。
https://www.tsingfun.com/it/te...
【解决】phpMyAdmin 导入数据文件最大限制 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...解决】phpMyAdmin 导入数据文件最大限制phpmyadmin_post_max_size etc php 7 0 apache2 php ini 默认配置2M，即通过http post上传的文件最大2M，修改配置搞定： PHP上传文件大小限制upload_max_filesize = 200M http post发送文件大小限 /etc/php/7.0/apache2/php....
PHP parse/syntax errors; and how to solve them
...yond the scope of this question (debugger, database connector, uml diagram etc.) IDE will save you time and will prevent more than just syntax errors.
– Louis Loudog Trottier
Mar 27 '17 at 4:48
...
file_put_contents - failed to open stream: Permission denied
...s directory if it is chmodd'ed correctly.
The other thing to do is echo "getcwd()". This will show you the current directory, and if this isn't '/something.../database/' then you'll need to change 'query.txt' to the full path for your server.
...
How to benchmark efficiency of PHP script
...ws to define steps in the code and reports time, memory usage, server load etc between two steps.
Something like:
$appgati->Step('1');
// Do some code ...
$appgati->Step('2');
$report = $appgati->Report('1', '2');
print_r($report);
Sample output array:
Array
(
...
htaccess Access-Control-Allow-Origin
... headers
of course after any changes in Apache you have to restart it:
/etc/init.d/apache2 restart
Then you can use
<IfModule mod_headers.c>
Header set Access-Control-Allow-Origin "*"
</IfModule>
And if mod_headers is not active, this line will do nothing at all. You can try ...