php interview questions and answers pdf free download,experienced,freshers
php interview questions and answers pdf free download,experienced,freshers
What is PHP?
PHP: machine-readable text Preprocessor is open supply server-side scripting language that's wide used for internet development. PHP scripts area unit dead on the server. PHP permits writing dynamically generated sites expeditiously and quickly. The syntax is usually borrowed from C, Java and perl. PHP is liberated to transfer and use.
What is PEAR in php?
PEAR(PHP Extension and Application Repository) may be a framework and repository for reusable PHP elements. PEAR may be a code repository containing every kind of php code snippets and libraries.
PEAR additionally offers a command-line interface that may be wont to mechanically install "packages".
Explain a way to submit kind while not a submit button.
We can bring home the bacon the higher than task by mistreatment JavaScript code joined to an occurrence trigger of any kind field and decision the document.form.submit() perform in JavaScript code.
Echo vs. print statement.
echo() and print() area unit language constructs in PHP, each area unit wont to output strings. The speed of each statements is sort of identical.
echo() will take multiple expressions whereas print cannot take multiple expressions.
Print come back true or false supported success or failure whereas echo does not come back true or false.
$message vs. $message in PHP.
$message may be a variable with a set name. $message may be a variable whose name is hold on in $message.
If $message contains "var", $message is that the same as $var.
Explain the various sorts of errors in PHP.
Notices, Warnings and Fatal errors area unit the categories of errors in PHP
Notices:
Notices represents non-critical errors, i.e. accessing a variable that has not nevertheless been outlined. By default, such errors don't seem to be showed the user in the slightest degree however whenever needed, you'll amendment this default behavior.
Warnings:
Warnings area unit additional serious errors however they are doing not lead to script termination. i.e line include() a file that doesn't exist. By default, these errors area unit showed the user.
Fatal errors:
Fatal errors area unit important errors i.e. line a non-existent perform or category. These errors cause the immediate termination of the script.
Explain the importance of the perform htmlentities.
The htmlentities() perform converts characters to HTML entities.
What is MIME?
MIME - Multi-purpose net Mail Extensions.
MIME sorts represents a customary approach of classifying file sorts over net.
Web servers and browsers have an inventory of MIME sorts, that facilitates files transfer of identical kind within the same approach, regardless of OS they're operating in.
A MIME kind has 2 parts: a kind and a subtype. they're separated by a slash (/).
MIME kind for Microsoft Word files is application and also the subtype is msword, i.e. application/msword.
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