I've seen several examples of scripts in thise forum about having a script generate a log file. I have a script that is run from cron and that monitors a file system for a specfic filename(s) and then performs some actions on them. Normally I call this script from another script (which the one... (2 Replies)
Hi,
I am new to the shell programming.,
My requirement is , I have an shell file, which call internally the sql file, which generates 4 files on the directory., and then shell has to create the file which contains all the ftp commands to extract the files to different server for later... (1 Reply)
Hi Friends
I have an requirement that i need to generate html file using script.
and the script output shold keep adding to that html file like tablewise.
can anyone please help me out in this.
thanks
Krish. (2 Replies)
Dear Members,
I have a table in Oracle DB and one of its column name is INFO which has data in text format which we need to fetch in a script and create an xml file of a new table from the input.
The contents of a single cell of INFO column is like:
Area:app - aam
Clean Up Criteria:... (0 Replies)
Hello;
I need to generate a csv file that contains a list of all the files in a particular server (from the root directory ie: \) that have a permission stamp of 777. I would like to create the csv so that it contains the following:
server name, file name, full path name where file exists,... (17 Replies)
hi all i want a script to FTP a file and should generate a quality checksum file
means when I FTP a file from one server to another server it should generate a QC file which should contain timestamp,no.of records in that file
Thanks in advance
saikumar (3 Replies)
Dears,
I am new in shell world and I need your help in this, I have to create a report based on the output file generated by another program. I want to write a shell script for this.
The output file generated every 15 minutes but i can’t open it until the end of day so the script will get the... (3 Replies)
Dears,I need your help in this, I have to create a report based on the output file generated by another program. I want to write a shell script for this. The output file generated every 15 minutes but i can’t open it until the end of day so the script will get the file as an input the file will be... (8 Replies)
Discussion started by: abdul2020
8 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)