Following are the listing of each of the commands that will enable a user to shut down, turn off, reboot, etc.
1.) halt
2.) poweroff
3.) reboot
4.) shutdown
Cheers!
Tuesday, March 30, 2010
Saturday, March 14, 2009
What is the difference between mysql_fetch_object and mysql_fetch_array?
MySQL fetch object will collect first single matching record where mysql_fetch_array will collect all matching records from the table in an array
What are the differences between require and include, include_once?
All three are used to an include file into the current page.
If the file is not present, require(), calls a fatal error, while in include() does not.
The include_once() statement includes and evaluates the specified file during the execution of the script. This is a behavior similar to the include() statement, with the only difference being that if the code from a file has already been included, it will not be included again. It des not call a fatal error if file not exists. require_once() does the same as include_once(), but it calls a fatal error if file not exists.
If the file is not present, require(), calls a fatal error, while in include() does not.
The include_once() statement includes and evaluates the specified file during the execution of the script. This is a behavior similar to the include() statement, with the only difference being that if the code from a file has already been included, it will not be included again. It des not call a fatal error if file not exists. require_once() does the same as include_once(), but it calls a fatal error if file not exists.
What is the difference between $message and $$message?
$message is a simple variable whereas $$message is a reference variable. Example:
$user = 'bob'
is equivalent to
$holder = 'user';
$$holder = 'bob';
$user = 'bob'
is equivalent to
$holder = 'user';
$$holder = 'bob';
Friday, March 13, 2009
PHP Interview Questions With Answers
Click at title of post to see the number of php interview questions.
Difference b/w echo and print?
There are following difference:
1. echo is a statement and print is a function.
2. echo can take multiple argument whereas print do not.
3. echo is faster then print function.
1. echo is a statement and print is a function.
2. echo can take multiple argument whereas print do not.
3. echo is faster then print function.
What is PHP?
PHP stands for PHP Hypertext Preprocessor. PHP is a scripting language embedded in HTML. for example:
<?php $name = "ashwani kumar"; ?>
<table>
<tr>
<td><?php echo $name; ?></td>
</tr>
</table>
PHP start with <?php tag and end with ?> tag.
<?php $name = "ashwani kumar"; ?>
<table>
<tr>
<td><?php echo $name; ?></td>
</tr>
</table>
PHP start with <?php tag and end with ?> tag.
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