I'm a newbie to Unix and hoping that it will be my saviour when all else has failed.
My "keys out of order" on my g4 laptop and neither Disk Util nor Disk Warrior can fix it.
I'm experimenting in the unix command line (I figure I can't mess this laptop up anymore , and have figured out how... (3 Replies)
I need to make it possible to automatically copy files from an external usb hard drive to a directory when i plug it in....if you can point me in the right direction, i would be very grateful....thanks a lot. :confused: (0 Replies)
Hello
Simple question about tcsh , i like to make external file that some tcsh script
will read from him var=="some value"
how can i make the include in tcsh files?
Thanks (0 Replies)
Hi Folks,
I'm a serious UNIX newbie... I'm using a bash shell on Mac OS X.
Basically I took up unix in order to use a specific image processing software package... I've learned enough to write a script to batch process all of my images, but I have so many that I would like to use an... (1 Reply)
Hi All,
I have the following problem:
1. I have a file containing a line:
a,b,d,${d},e,f
2. From within a script I grep the file for '^a,' to get the line
3. I obtain the fourth field as follows:
Field4="$( print -r $fileEntry | cut -d, -f4 )"
4. The script exports variables at the... (1 Reply)
Hi,
I have to run my JAVA programs in UNIX server. The java program uses some external jar files for compiling. I have set the classpath to the folder where all the jar files are present using EXPORT classpath command.
But when i compile, it shows errors.. saying that the classes relating... (8 Replies)
Hi all,
Can anybody help me with how I can connect a usb pendrive or external disk to a Sun Server which runs on Solaris 9? I am able to connect the usb drive to a windows server easily and copy files but am wondering if it is possible to do that with Solaris.
Any help will be appreciated. thanks. (3 Replies)
I am running Matlab in a unix enviroment and in my Matlab program I am calling an outside program (mav) to run with a unix command in Matlab:
unix('mav -u 5 -c 1 -s')
My goal is to edit the input files (three different files) for that external program and then run that external program... (0 Replies)
Hi there
Well, it's my first time on this board, so short to myself:
I'm matibaski, working as a webdeveloper and also as a system administrator on ubuntu server machines.
The problem:
I created a small apache-hostingscript by myself and it works fine.
But after some addings and new... (1 Reply)
My code is this, what I'm trying to accomplish is to make a list of all pdf documents in my computer and then copy all of those documents to my external hard drive in a directory
mkdir /Volumes/Hardrive-1/allpdf
echo "File Locations" > /Volumes/Hardrive-1/allpdf/FileLocations.txt
mdfind pdf... (2 Replies)
Discussion started by: darpness
2 Replies
LEARN ABOUT PHP
debug_zval_dump
DEBUG_ZVAL_DUMP(3) 1 DEBUG_ZVAL_DUMP(3)debug_zval_dump - Dumps a string representation of an internal zend value to outputSYNOPSIS
void debug_zval_dump (mixed $variable, [mixed $...])
DESCRIPTION
Dumps a string representation of an internal zend value to output.
PARAMETERS
o $variable
- The variable being evaluated.
RETURN VALUES
No value is returned.
EXAMPLES
Example #1
debug_zval_dump(3) example
<?php
$var1 = 'Hello World';
$var2 = '';
$var2 =& $var1;
debug_zval_dump(&$var1);
?>
The above example will output:
&string(11) "Hello World" refcount(3)
Note
Beware the refcount
The refcount value returned by this function is non-obvious in certain circumstances. For example, a developer might expect the
above example to indicate a refcount of 2. The third reference is created when actually calling debug_zval_dump(3).
This behavior is further compounded when a variable is not passed to debug_zval_dump(3) by reference. To illustrate, consider a
slightly modified version of the above example:
Example #2
<?php
$var1 = 'Hello World';
$var2 = '';
$var2 =& $var1;
debug_zval_dump($var1); // not passed by reference, this time
?>
The above example will output:
string(11) "Hello World" refcount(1)
Why refcount(1)? Because a copy of $var1 is being made, when the function is called.
This function becomes even more confusing when a variable with a refcount of 1 is passed (by copy/value):
Example #3
<?php
$var1 = 'Hello World';
debug_zval_dump($var1);
?>
The above example will output:
string(11) "Hello World" refcount(2)
A refcount of 2, here, is extremely non-obvious. Especially considering the above examples. So what's happening?
When a variable has a single reference (as did $var1 before it was used as an argument to debug_zval_dump(3)), PHP's engine opti-
mizes the manner in which it is passed to a function. Internally, PHP treats $var1 like a reference (in that the refcount is
increased for the scope of this function), with the caveat that if the passed reference happens to be written to, a copy is made,
but only at the moment of writing. This is known as "copy on write."
So, if debug_zval_dump(3) happened to write to its sole parameter (and it doesn't), then a copy would be made. Until then, the
parameter remains a reference, causing the refcount to be incremented to 2 for the scope of the function call.
SEE ALSO var_dump(3), debug_backtrace(3), References Explained, References Explained (by Derick Rethans).
PHP Documentation Group DEBUG_ZVAL_DUMP(3)