Answer & Solution
Answer: Option A
Solution:
In PHP, variables must be declared before they can be used.
Q
Which of the following is true about PHP variables?
Related Questions on Average
Which of the following symbols is used to concatenate strings in PHP?
A). +
B). <>
C). .
D). -
Which of the following is NOT a valid PHP comparison operator?
A). <=
B). ==
C). <>
D). !
What is the purpose of the PHP include statement?
A). To include and evaluate an external PHP file
B). To create a loop in PHP
C). To define a function in PHP
D). To execute a SQL query
What is the purpose of the PHP require statement?
A). To include and evaluate an external PHP file
B). To define a function in PHP
C). To create a loop in PHP
D). To execute a SQL query
What is the correct syntax to start a PHP script?
A). <?php
B). <script>
C). <?>
D). <!DOCTYPE php>
What is the purpose of the PHP unset() function?
A). To destroy a specified variable
B). To create an array in PHP
C). To execute SQL queries
D). To define a function in PHP
Which of the following statements is true about PHP arrays?
A). PHP arrays can hold values of different data types
B). PHP arrays must have continuous index values
C). PHP arrays are immutable
D). PHP arrays can only store integers
What is the purpose of the PHP exit() function?
A). To terminate the script execution
B). To print output to the browser
C). To create a loop in PHP
D). To define a function in PHP
What does the phpinfo() function do in PHP?
A). Displays information about the PHP environment
B). Executes SQL queries
C). Validates user input
D). Encrypts data transmission
Which of the following is a valid PHP constant?
A). MY_CONST
B). $myConst
C). MY_CONST
D). myConst