How to store the uploaded file to the
move_uploaded_file ( string filename, string destination)
This function checks to ensure that the file designated by filename is a
valid upload file (meaning that it was uploaded via PHP's HTTP POST
upload mechanism). If the file is valid, it will be moved to the
filename given by destination.
If filename is not a valid upload file, then no action will occur, and
move_uploaded_file() will return FALSE.
If filename is a valid upload file, but cannot be moved for some reason,
no action will occur, and move_uploaded_file() will return FALSE.
Additionally, a warning will be issued.
Explain about Type Juggling in php?
PHP does not require (or support) explicit type definition in variable
declaration; a variable's type is determined by the context in which
that variable is used. That is to say, if you assign a string value to
variable $var, $var becomes a string. If you then assign an integer
value to $var, it becomes an integer.
An example of PHP's automatic type conversion is the addition operator
'+'. If any of the operands is a float, then all operands are evaluated
as floats, and the result will be a float. Otherwise, the operands will
be interpreted as integers, and the result will also be an integer. Note
that this does NOT change the types of the operands themselves; the only
change is in how the operands are evaluated.
$foo += 2; // $foo is now an integer (2)
$foo = $foo + 1.3; // $foo is now a float (3.3)
$foo = 5 + "10 Little Piggies"; // $foo is integer (15)
$foo = 5 + "10 Small Pigs"; // $foo is integer (15)
If the last two examples above seem odd, see String conversion to
If you wish to change the type of a variable, see settype().
If you would like to test any of the examples in this section, you can
use the var_dump() function.
Note: The behavior of an automatic conversion to array is currently
Since PHP (for historical reasons) supports indexing into strings via
offsets using the same syntax as array indexing, the example above leads
to a problem: should $a become an array with its first element being
"f", or should "f" become the first character of the string $a? The
current versions of PHP interpret the second assignment as a string
offset identification, so $a becomes "f", the result of this automatic
conversion however should be considered undefined. PHP 4 introduced the
new curly bracket syntax to access characters in string, use this syntax
instead of the one presented above:
How can I embed a java programme in php file and what changes have to be
done in php.ini file?
There are two possible ways to bridge PHP and Java: you can either
integrate PHP into a Java Servlet environment, which is the more stable
and efficient solution, or integrate Java support into PHP. The former
is provided by a SAPI module that interfaces with the Servlet server,
the latter by this Java extension.
The Java extension provides a simple and effective means for creating
and invoking methods on Java objects from PHP. The JVM is created using
JNI, and everything runs in-process.
getProperty('java.version') . ''; echo 'Java vendor=' . $system->getProperty('java.vendor')
. ''; echo 'OS=' . $system->getProperty('os.name') . ' ' . $system->getProperty('os.version')
. ' on ' . $system->getProperty('os.arch') . ' '; // java.util.Date
example $formatter = new Java('java.text.SimpleDateFormat', "EEEE, MMMM
dd, yyyy 'at' h:mm:ss a zzzz"); echo $formatter->format(new
The behaviour of these functions is affected by settings in php.ini.
Table 1. Java configuration options
Name Default Changeable
Explain the ternary conditional operator in PHP?
Expression preceding the ? is evaluated, if itís true, then the
expression preceding the : is executed, otherwise, the expression
following : is executed.
Whatís the difference between include and require?
Itís how they handle failures. If the file is not found by require(), it
will cause a fatal error and halt the execution of the script. If the
file is not found by include(), a warning will be issued, but execution
How many ways can we get the value of current session id?
session_id() returns the session id for the current session.
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