PHP Interview Questions and Answers

1. What is the output of the following code?

A. Empty  B. true  C. false  D. FALSE

<code>echo function_exists('print');</code>

Explanation: print is a language construct, so function_exists() returns false; echoing false produces no output.

2. Which of the following is a function?

A. array  B. eval C. each D. list

Explanation: array , eval , and list are language constructs, while each is a function.

3. Which function will return TRUE when added?

A. ord(65) B. chr(65) C. 65+''  D. ''+65

<code>return ? == 'A';</code>

Explanation: ord('A') converts the character to its ASCII number, whereas chr(65) converts the number back to a character.

4. What is the output of the following code?

A. hello  B. empty  C. error D. hellohello

<code>$a[bar] = 'hello';</code><code>echo $a[bar];</code><code>echo $a['bar'];</code>

Explanation: The index bar can be used without quotes, but quoting it is recommended.

5. Which code will output "banana"?

<code>$arr = ['name'=>'banana'];</code>

Options:

A. echo "{$res['name']}";

B. echo "$res['name']";

C. echo "{$res[name]}";

D. echo "$res[name]";

Explanation: Within double quotes, array keys that are strings must not be quoted unless wrapped in braces.

6. Which error type cannot be captured by the standard error handler?

A. E_WARNING

B. E_USER_ERROR

C. E_PARSE

D. E_NOTICE

Explanation: (see table below)

Error Type

Description

E_ERROR

Fatal runtime error; script terminates.

E_WARNING

Runtime warning; script continues.

E_PARSE

Compile-time syntax error.

E_NOTICE

Runtime notice; non-fatal.

E_USER_ERROR

User-generated error via

trigger_error()

.

7. Which error type cannot be caught by a custom error handler?

A. E_WARNING

B. E_USER_ERROR

C. E_PARSE

D. E_NOTICE