What is PHP?
PHP: Hypertext Preprocessor is open source server-side scripting language that
is widely used for web development. PHP scripts are executed on the server. PHP
allows writing dynamically generated web pages efficiently and quickly. The
syntax is mostly borrowed from C, Java and perl. PHP is free to download and
use.
What is PEAR in php?
PEAR(PHP Extension and Application Repository) is a framework and repository for
reusable PHP components. PEAR is a code repository containing all kinds of php
code snippets and libraries.
PEAR also offers a command-line interface that can be used to automatically install "packages".
PEAR also offers a command-line interface that can be used to automatically install "packages".
Explain how to submit form without a submit button.
We can achieve the above task by using JavaScript code linked to an event
trigger of any form field and call the document.form.submit() function in
JavaScript code.
Echo vs. print statement.
echo() and print() are language constructs in PHP, both are used to output
strings. The speed of both statements is almost the same.
echo() can take multiple expressions whereas print cannot take multiple expressions.
Print return true or false based on success or failure whereas echo doesn't return true or false.
echo() can take multiple expressions whereas print cannot take multiple expressions.
Print return true or false based on success or failure whereas echo doesn't return true or false.
$message vs. $$message in PHP.
$message is a variable with a fixed name. $$message is a variable whose name is
stored in $message.
If $message contains "var", $$message is the same as $var.
If $message contains "var", $$message is the same as $var.
Explain the different types of errors in PHP.
Notices, Warnings and Fatal errors are the types of errors in PHP
Notices:
Notices represents non-critical errors, i.e. accessing a variable that has not yet been defined. By default, such errors are not displayed to the user at all but whenever required, you can change this default behavior.
Warnings:
Warnings are more serious errors but they do not result in script termination. i.e calling include() a file which does not exist. By default, these errors are displayed to the user.
Fatal errors:
Fatal errors are critical errors i.e. calling a non-existent function or class. These errors cause the immediate termination of the script.
Notices:
Notices represents non-critical errors, i.e. accessing a variable that has not yet been defined. By default, such errors are not displayed to the user at all but whenever required, you can change this default behavior.
Warnings:
Warnings are more serious errors but they do not result in script termination. i.e calling include() a file which does not exist. By default, these errors are displayed to the user.
Fatal errors:
Fatal errors are critical errors i.e. calling a non-existent function or class. These errors cause the immediate termination of the script.
Explain the importance of the function htmlentities.
The htmlentities() function converts characters to HTML entities.
What is MIME?
MIME - Multi-purpose Internet Mail Extensions.
MIME types represents a standard way of classifying file types over Internet.
Web servers and browsers have a list of MIME types, which facilitates files transfer of the same type in the same way, irrespective of operating system they are working in.
A MIME type has two parts: a type and a subtype. They are separated by a slash (/).
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MIME types represents a standard way of classifying file types over Internet.
Web servers and browsers have a list of MIME types, which facilitates files transfer of the same type in the same way, irrespective of operating system they are working in.
A MIME type has two parts: a type and a subtype. They are separated by a slash (/).
If anyone want to learn php training in Jaipur. Please Visit on - LinuxWorld Informatics Pvt. Ltd
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