Just out of curiosity, do you have any idea why it didn't work as originally scripted? It seems to me that it should have evaluated out to an integer so I'm not understanding what went wrong.
Hi,
Is their an easy way to realloate hard drive space on Solaris 10.
For example :
/c20td0 10G
/space 90 G
I would like to move some of the hard-drive space from "/space" and add it to "/c20td0". In Windows this can be easily done using Partition magic, anything similar for UNIX? (4 Replies)
Hi
I have 2 75GB SCSI hard drives and 2 250GB SATA hard drives which are using RAID Level 1 respectively. I wana have both FTP and Apache installed on them as services. I'm wondering what's the best partitioning schem? I wana use FC3 as my OS, so, I thought I can use the 75GB hard drive as the /... (0 Replies)
Sorry if this is totally the wrong place to post this but I have a question or something rather thats bugging me. I got a new Dell Inspiron laptop the other day and I was expecting it to have 80G on it, well atleast 70 or so after installation of OS and such but after looking carefully yesterday, I... (8 Replies)
Hi all,
I would to know if I can install Linux on an external 320 gigabyte hard drive..I have Windows XP on my internal hard drive which is 80 GB , but this installation on 320 external HDD is for testing purpose
If it is possible to install Linux on the external drive, will it cause any... (5 Replies)
Linux Red Hat machine
GNOME version 2.16.0
External hard drive is a Western Digital 500 GB My Book Essential.
How can I reformat the external hard drive so that I can backup my Linux machine?
Thanks (1 Reply)
Hi,
I run Fedora 17.
I created a physical volume of 30GB on a disk with 60GB of space so there is 30GB of free space. On the physical volume, I created my volume group and logical volumes. I assigned all the space in the physical volume to my volume group. I need to add the 30GB of free space... (1 Reply)
Hi,
I`m trying to copy an entire directory(with numerous files, folders and subfolders etc, a content size of 500gigs) from a linux machine running Red Hat Enterprise Linux 6 to an external hard drive on my windows.
I downloaded and installed psftp on my windows and I can login using psftp... (9 Replies)
Hi there,
I'm currently preparing for an exam and came across a question that I don't really know how to answer.
"You want to set up a hard drive for a videoserver under linux.
- The videofiles will have a size of at least 10MB and a maximum of 8BG.
- The hard drive has a disk space of... (1 Reply)
Discussion started by: Eggsy
1 Replies
LEARN ABOUT PHP
eval
EVAL(3) 1 EVAL(3)eval - Evaluate a string as PHP codeSYNOPSIS
mixed eval (string $code)
DESCRIPTION
Evaluates the given $code as PHP.
Caution
The eval(3) language construct is very dangerous because it allows execution of arbitrary PHP code. Its use thus is discouraged.
If you have carefully verified that there is no other option than to use this construct, pay special attention not to pass any user
provided data into it without properly validating it beforehand.
PARAMETERS
o $code
- Valid PHP code to be evaluated. The code mustn't be wrapped in opening and closing PHP tags, i.e. 'echo "Hi!";' must be passed
instead of '<? echo "Hi!"; >'. It is still possible to leave and reenter PHP mode though using the appropriate PHP tags, e.g.
'echo "In PHP mode!"; ?>In HTML mode!<? echo "Back in PHP mode!";'. Apart from that the passed code must be valid PHP. This
includes that all statements must be properly terminated using a semicolon. 'echo "Hi!"' for example will cause a parse error,
whereas 'echo "Hi!";' will work. A return statement will immediately terminate the evaluation of the code. The code will be exe-
cuted in the scope of the code calling eval(3). Thus any variables defined or changed in the eval(3) call will remain visible
after it terminates.
RETURN VALUES eval(3) returns NULL unless return is called in the evaluated code, in which case the value passed to return is returned. If there is a
parse error in the evaluated code, eval(3) returns FALSE and execution of the following code continues normally. It is not possible to
catch a parse error in eval(3) using set_error_handler(3).
EXAMPLES
Example #1
eval(3) example - simple text merge
<?php
$string = 'cup';
$name = 'coffee';
$str = 'This is a $string with my $name in it.';
echo $str. "
";
eval("$str = "$str";");
echo $str. "
";
?>
The above example will output:
This is a $string with my $name in it.
This is a cup with my coffee in it.
NOTES
Note
Because this is a language construct and not a function, it cannot be called using variable functions.
Tip
As with anything that outputs its result directly to the browser, the output-control functions can be used to capture the output of
this function, and save it in a string (for example).
Note
In case of a fatal error in the evaluated code, the whole script exits.
SEE ALSO call_user_func(3).
PHP Documentation Group EVAL(3)