Tag: php

Questions Related to php

A constructor is a special kind of…
php

  1. Class

  2. Method

  3. Object

  4. Variable

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Correct Option: B

What can you use to replace like with hate in I like Eminem?

php

  1. preg_replace("like", "hate", "I like Eminem")

  2. preg_replace("/like/", "hate", "I like Eminem")

  3. preg_replace("/like/", "/hate/", "I like Eminem")

  4. preg_replace("hate", "like", "I like Eminem")

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Correct Option: A

What library do you need in order to process images?
php

  1. c-client library

  2. GIF/PNG library

  3. Image Library

  4. GD library

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Correct Option: D

What is the problem with =$expression ?> ?

php

  1. It requires short tags and this is not compatible with XML

  2. There is no problem

  3. This syntax doesn't even exist It requires a special PHP library that may not always be available

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Correct Option: A

What does break; do?

php

  1. Ends execution of the current switch structure

  2. Moves on to the next iteration of the current for, foreach, while, do-while or switch structure

  3. Ends execution of the current for, foreach, while, do-while or switch structure

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Correct Option: C

Can this PHP code be valid: $4bears = $bears->getFirst4();

php

  1. Yes

  2. No

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Correct Option: A

AI Explanation

To answer this question, let's analyze the given PHP code:

$4bears = $bears->getFirst4();

In PHP, variable names should start with a letter or underscore. They cannot start with a number. Therefore, the variable name $4bears is not valid.

The correct way to write the code would be to use a valid variable name, such as:

$_4bears = $bears->getFirst4();

So, the correct answer is B) No.

Assuming all the variables a, b, c have already been defined, could this be a variable name: ${$a}[$b][$c] ?
php

  1. Yes

  2. No

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Correct Option: A

Put this line php display_errors=false in a .htaccess file when you deploy the application?

php

  1. That won't hide any error 'coz you can't use .htaccess to control the PHP engine Bad idea, I want to see when errors occur

  2. That won't hide any error 'coz it's not the correct code

  3. Good idea, increases security

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Correct Option: B

What does this function do:
php

  1. tests whether $variable is a number and ends in 2

  2. tests whether $variable ends in 2

  3. tests whether $variable is a number and contains 2

  4. tests whether $variable is an even number

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Correct Option: D