Linux Ask! is a Q & A web site specific for Linux related questions. Questions are collected, answered and audited by experienced Linux users.
Error control operator in PHP
Answer:
The error control operator (the @) is useful to ignore any error messages that might be generated by PHP.
E.g.
<?php
$my_value = @$my_array[$key];
The above statement will not generate any warning even if the index $key doesn't exist.
Render web page using PyQt
Answer:
Qt bindings to WebKit have been added since 4.4, so you can use PyQt to script the browser (Webkit based).
Firstly, make sure you have installed the need packages:
# sudo apt-get install libqt4-core libqt4-webkit python-qt4
Then you can write a simple script to test, e.g.
#!/usr/bin/env python
import sys
from PyQt4.QtCore import *
from PyQt4.QtGui import *
from PyQt4.QtWebKit import *
app = QApplication(sys.argv)
web = QWebView()
web.load(QUrl("http://www.google.com"))
web.show()
sys.exit(app.exec_())
Suggested Mercurial .hgignore settings for XCode projects
Answer:
Save the following lines as .hgignore and put it under the root of your project root directory, Mercurial will ignore them automatically.
^build/*
\.mode1v3
\.pbxuser
\.DS_Store
^\.*Turn on register_globals in PHP
Answer:
When turned on, register_globals will automatically inject the PHP script with variables such as those from HTML form. The feature was DEPRECATED and turn off by default in the recent PHP distributions.
But if you still want to change it, you need to edit the php.ini
vi /etc/php.ini
Locate and set
register_globals = on;Remember to restart web server such as Apache if needed.
Change the PHP’s maximum allowed form post size
Answer:
The default maximum allowed form post size in PHP is only 8MB. If you want to change it, you need to edit the php.ini
vi /etc/php.ini
Locate and set (16M in the following example)
memory_limit = 16M;
post_max_size = 16M;
Try it with the number you need.
Also, remember to restart web server such as Apache if needed.
