Functions Of PHP Software Language Quiz
In this quiz, we’ll be testing your knowledge on all the different functions of the widely used programming and web development language, PHP! What can you tell us about these functions and how they are used? Let’s find out!
Questions and Answers
- 1.
In PHP, arrays may be sorted with which of the following functions?
- A.
Uksort
- B.
Arsort
- C.
Ksort
- D.
All of the above
Correct Answer
D. All of the aboveExplanation
All of the above functions can be used to sort arrays in PHP.
- uksort is used to sort an array by keys using a user-defined comparison function.
- arsort is used to sort an array in descending order according to the values.
- ksort is used to sort an array by keys in ascending order.
Therefore, all three functions can be used to sort arrays in PHP.Rate this question:
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- 2.
PHP comments for a single line have the following syntax:
- A.
/* comments /*
- B.
#
- C.
//
- D.
::
- E.
A&B
Correct Answer
E. A&BExplanation
The correct answer is A&B. PHP comments for a single line can be written using either the // or # symbols. The /* comments */ syntax is used for multi-line comments in PHP. The :: symbol is not used for commenting in PHP.Rate this question:
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- 3.
Which of the following functions are used by PHP to find out what type a variable is?
- A.
Gettype()
- B.
Is_double()
- C.
Get_type()
- D.
Is_date()
- E.
A&B
Correct Answer
E. A&BExplanation
The functions gettype() and is_double() are used by PHP to find out what type a variable is. The gettype() function returns the type of a variable as a string, while the is_double() function checks if a variable is of type double. Therefore, the correct answer is A&B.Rate this question:
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- 4.
The three possible connection states in PHP are ________.
- A.
Normal
- B.
Aborted
- C.
Timeout
- D.
All of the above
Correct Answer
D. All of the aboveExplanation
The correct answer is "All of the above" because in PHP, there are three possible connection states: normal, aborted, and timeout.Rate this question:
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- 5.
In PHP, the error control operator is ________.
- A.
*
- B.
%
- C.
@
- D.
&
Correct Answer
C. @Explanation
The correct answer is "@" because in PHP, the "@" symbol is used as the error control operator. It is used to suppress error messages that would normally be displayed on the screen, allowing the programmer to handle errors in a different way or ignore them completely.Rate this question:
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- 6.
In PHP, instructions are terminated with a _______.
- A.
;
- B.
#
- C.
!
- D.
%>
Correct Answer
A. ;Explanation
In PHP, instructions are terminated with a semicolon (;). This is a common practice in many programming languages, including PHP, to indicate the end of a statement or instruction. The semicolon is used to separate multiple instructions on a single line or to mark the end of a single instruction. It is important to include the semicolon at the end of each instruction in PHP to avoid syntax errors and ensure proper execution of the code.Rate this question:
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- 7.
What does PHP stand for?
- A.
Hypertext Preprocessor
- B.
Personal Home Page
- C.
Private Home Page
- D.
Personal Hypertext Processor
Correct Answer
A. Hypertext PreprocessorExplanation
PHP stands for Hypertext Preprocessor. It is a server-side scripting language that is used to develop dynamic web pages and applications. PHP is widely used for its simplicity and flexibility, allowing developers to create interactive and dynamic websites. It is an open-source language and can be embedded within HTML code. PHP is compatible with various databases and runs on different operating systems, making it a popular choice for web development.Rate this question:
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- 8.
PHP server scripts are surrounded by delimiters, which?
- A.
- B.
- C.
...
- D.
...
Correct Answer
B.Explanation
PHP server scripts are surrounded by delimiters known as opening and closing tags. The opening tag is "". These delimiters indicate the beginning and end of PHP code within an HTML file.Rate this question:
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- 9.
How do you write "Hello World" in PHP?
- A.
"Hello World";
- B.
Echo "Hello World";
- C.
Document.Write("Hello World");
- D.
Response.write("Hello World")
Correct Answer
B. Echo "Hello World";Explanation
The correct answer is "echo "Hello World";". In PHP, the echo statement is used to output text. In this case, it will output the string "Hello World" to the screen. The other options are not valid syntax in PHP.Rate this question:
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- 10.
All variables in PHP start with which symbol?
- A.
!
- B.
$
- C.
&
- D.
#
Correct Answer
B. $Explanation
In PHP, all variables start with the symbol "$". This symbol is used to indicate that the following word or phrase is a variable name. It is required to use the "$" symbol before the variable name in order to declare and use variables in PHP.Rate this question:
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- 11.
Include files must have the file extension ".inc"
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
The statement is false because include files can have any file extension, not just ".inc". The file extension is not a determining factor for whether a file can be included or not.Rate this question:
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- 12.
In PHP you can use both single quotes ( ' ' ) and double quotes ( " " ) for strings:
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
In PHP, both single quotes and double quotes can be used for strings. This means that you can enclose a string in either single quotes or double quotes and both will be treated as valid string delimiters. This flexibility allows for easier string manipulation and concatenation within PHP code.Rate this question:
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- 13.
What is the correct way to include the file "time.inc" ?
- A.
- B.
- C.
- D.
Correct Answer
C.Explanation
The correct way to include the file "time.inc" is by using the include statement in PHP. This can be done by writing "include 'time.inc';" in the PHP code. The include statement is used to include and evaluate the specified file during the execution of the script. It allows the code in the included file to be executed as if it was written directly in the main script.Rate this question:
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- 14.
What is the correct way to create a function in PHP?
- A.
Function myFunction()
- B.
New_function myFunction()
- C.
Create myFunction()
Correct Answer
A. Function myFunction()Explanation
The correct way to create a function in PHP is by using the keyword "function" followed by the function name and parentheses. This is the standard syntax for defining a function in PHP.Rate this question:
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- 15.
What is the correct way to connect to a MySQL database?
- A.
Mysql_open("localhost");
- B.
Connect_mysql("localhost");
- C.
Dbopen("localhost");
- D.
Mysql_connect("localhost");
Correct Answer
D. Mysql_connect("localhost");Explanation
The correct way to connect to a MySQL database is by using the function "mysql_connect("localhost");". This function establishes a connection to the MySQL server running on the localhost.Rate this question:
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- 16.
What is the correct way to add 1 to the $count variable?
- A.
Count++;
- B.
$count++;
- C.
++count
- D.
$count =+1
Correct Answer
B. $count++;Explanation
The correct way to add 1 to the $count variable is by using the $count++ syntax. This is a shorthand notation for incrementing the value of a variable by 1.Rate this question:
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- 17.
PHP can be run on Microsoft Windows IIS(Internet Information Server):
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
PHP can be run on Microsoft Windows IIS (Internet Information Server). This is true because PHP is a server-side scripting language that is compatible with various web servers, including Microsoft Windows IIS. IIS is a web server software created by Microsoft for hosting websites and applications on Windows servers. It supports PHP through the use of FastCGI module, which allows PHP scripts to be executed on IIS. Therefore, PHP can indeed be run on Microsoft Windows IIS.Rate this question:
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- 18.
In PHP 5, MySQL support is enabled by default:
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
In PHP 5, MySQL support is not enabled by default. This means that if you want to use MySQL with PHP 5, you need to enable it manually by configuring the PHP installation or by installing the necessary MySQL extensions.Rate this question:
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- 19.
Which one of these variables has an illegal name?
- A.
$my-Var
- B.
$myVar
- C.
$my_Var
Correct Answer
A. $my-VarExplanation
Variable names in programming typically cannot contain special characters like hyphens (-). Therefore, $my-Var is an illegal variable name because it includes a hyphen. Variable names can only include letters, numbers, and underscores (_).Rate this question:
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- 20.
Which of the following regular expressions will match the string no.no.no?
- A.
No?no?no
- B.
No*no*no*
- C.
..\...\...
- D.
\.\..\.\..\.\.
Correct Answer
C. ..\...\...Explanation
The correct answer is "..\...\...". This regular expression consists of three parts: ".." matches any two characters, "\..." matches the exact string "...", and "\." matches a single dot. Therefore, this regular expression will match the string "no.no.no" exactly.Rate this question:
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- 21.
A constructor is a special kind of…
- A.
Class
- B.
Method
- C.
Object
- D.
Variable
Correct Answer
B. MethodExplanation
A constructor is a special kind of method that is used to initialize objects of a class. It is called automatically when an object is created and is used to set initial values for the object's attributes or perform any other necessary setup operations. Constructors have the same name as the class they belong to and do not have a return type. Therefore, the correct answer is "Method".Rate this question:
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- 22.
What can you use to replace like with hate in I like Eminem?
- A.
Preg_replace("like", "hate", "I like Eminem")
- B.
Preg_replace("/like/", "hate", "I like Eminem")
- C.
Preg_replace("/like/", "/hate/", "I like Eminem")
- D.
Preg_replace("hate", "like", "I like Eminem")
Correct Answer
A. Preg_replace("like", "hate", "I like Eminem")Explanation
The correct answer is preg_replace("like", "hate", "I like Eminem"). This is because the preg_replace function is used to replace a pattern with a specified replacement in a string. In this case, the pattern "like" is being replaced with the replacement "hate" in the string "I like Eminem".Rate this question:
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- 23.
What library do you need in order to process images?
- A.
C-client library
- B.
GIF/PNG library
- C.
Image Library
- D.
GD library
Correct Answer
D. GD libraryExplanation
The GD library is needed in order to process images.Rate this question:
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- 24.
What is the problem with <?=$expression ?> ?
- A.
It requires short tags and this is not compatible with XML
- B.
There is no problem
- C.
This syntax doesn't even exist It requires a special PHP library that may not always be available
Correct Answer
A. It requires short tags and this is not compatible with XMLExplanation
The problem with is that it requires short tags, which are not compatible with XML. Short tags are a shorthand way of writing PHP code, but they are not universally supported and can cause issues when working with XML.Rate this question:
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- 25.
What does break; do?
- A.
Ends execution of the current switch structure
- B.
Moves on to the next iteration of the current for, foreach, while, do-while or switch structure
- C.
Ends execution of the current for, foreach, while, do-while or switch structure
Correct Answer
C. Ends execution of the current for, foreach, while, do-while or switch structureExplanation
The break; statement ends the execution of the current for, foreach, while, do-while or switch structure. This means that when the break; statement is encountered, the program will immediately exit the loop or switch structure and continue executing the next line of code after the loop or switch.Rate this question:
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- 26.
Can this PHP code be valid: $4bears = $bears->getFirst4();
- A.
Yes
- B.
No
Correct Answer
A. YesExplanation
The given PHP code can be valid if there is a variable named "$bears" that is an object and has a method called "getFirst4()" defined. The code assigns the result of calling this method on the "$bears" object to a variable named "$4bears". The code is syntactically correct and will execute without any errors if the necessary conditions are met.Rate this question:
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- 27.
Assuming all the variables a, b, c have already been defined, could this be a variable name: ${$a}[$b][$c] ?
- A.
Yes
- B.
No
Correct Answer
A. YesExplanation
Yes, this could be a variable name. The expression ${$a}[$b][$c] is using variable variables in PHP. The value of $a is used as the name of the first variable, $b is used as the name of the second variable, and $c is used as the name of the third variable. This allows for dynamic variable naming and accessing.Rate this question:
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- 28.
Put this line php display_errors=false in a .htaccess file when you deploy the application?
- A.
That won't hide any error 'coz you can't use .htaccess to control the PHP engine Bad idea, I want to see when errors occur
- B.
That won't hide any error 'coz it's not the correct code
- C.
Good idea, increases security
Correct Answer
B. That won't hide any error 'coz it's not the correct code -
- 29.
What does this function do: <?php function my_func($variable) {return (is_numeric($variable) && $variable % 2 == 0);}?>
- A.
Tests whether $variable is a number and ends in 2
- B.
Tests whether $variable ends in 2
- C.
Tests whether $variable is a number and contains 2
- D.
Tests whether $variable is an even number
Correct Answer
D. Tests whether $variable is an even numberExplanation
The given function "my_func" checks whether the input variable is both numeric and an even number. It uses the "is_numeric" function to check if the variable is a number and then checks if the variable modulus 2 is equal to 0 to determine if it is even. Therefore, the function tests whether the variable is an even number.Rate this question:
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