Basic Php — Part 1 MCQs with Explanations

PHP previously stood for Personal Home Page now stands for Hypertext Preprocessor.

Any of the above editors can be used to type php code and run it.

To run PHP code you need to have PHP and a web server, both IIS and Apache are web servers.You can choose either one according to your platform.

Version 5 added support for Exception Handling.

/* */ can also be use to comment just a single line although it is used for paragraphs. // and # are used only for single line comment.

You need not specify the datatype in php.

.(dot) is used to combine two parts of the statement. Example ( $num . “Hello World” ) will output 1Hello World.

A variable can’t start with a number. Also $this is a special variable that can’t be assigned, but $This can be assigned.

The $bar = &$foo; line will reference $foo via $bar.

echo(), print() and printf() all three can be used to output a statement onto the screen. The sprintf() statement is functionally identical to printf() except that the output is assigned to a string rather than rendered to the browser.

PHP treats strings in the same fashion as arrays, allowing for specific characters to be accessed via array offset notation.

The (array) is a cast operator which is used for converting values from other data types to array.

The integer value at the beginning of the original $total string is used in the calculation. However if it begins with anything but a numerical value, the value will be 0.

a += b is an addition assignment whose outcome is a = a + b. Same can be done with subtraction,multiplication,division etc.

A backslash is used so that the dollar sign is treated as a normal string character rather than prompt PHP to treat $x as a variable. The backslash used in this manner is known as escape character.

Because $count is static, it retains its previous value each time the function is executed.

.= is a concatenation-assignment. $a equals its current value concatenated with “get”.

=== operator returns 1 if $a and $b are equivalent and $a and $b have the same type.

PHP treats \n as newline character.

When a string is enclosed within single quotes both variables and escape sequences will not be interpreted when the string is parsed.

If a break statement isn’t present, all subsequent case blocks will execute until a break statement is located.

The continue statement causes execution of the current loop iteration to end and commence at the beginning of the next iteration.

?: is known as ternary operator. If condition is true then the part just after the ? is executed else the part after : .

$a is 4 and $b is 3. The former because $arg is passed by reference, the latter because the return value of the function is a copy of the initial value of the argument.

.php is the correct answer to “PHP files have a default file extension of_______.”. This question is standard in competitive examination syllabi for Basic Php.

All of the mentioned. is the correct answer to “Which of the conditional statements is/are supported by PHP? 1. if statements 2. if-else statements 3. if-elseif statements 4. switch statements”. This question is standard in competitive examination syllabi for Basic Php.

All of the mentioned is the correct answer to “Which of the looping statements is/are supported by PHP? 1. for loop 2. while loop 3. do-while loop 4. foreach loop”. This question is standard in competitive examination syllabi for Basic Php.

Rasmus Lerdorf is the correct answer to “Who is the father of PHP”. This question is standard in competitive examination syllabi for Basic Php.

It converts them to a common compatible data type and then compares the resulting values is the correct answer to “How does the identity operator === compare two values”. This question is standard in competitive examination syllabi for Basic Php.

When the parameter is being declared as passed by reference is the correct answer to “Under what circumstance is it impossible to assign a default value to a parameter while declaring a function”. This question is standard in competitive examination syllabi for Basic Php.

Dollar-sign is the correct answer to “Variables always start with a ........ in PHP”. This question is standard in competitive examination syllabi for Basic Php.

True is the correct answer to “PHP is an open source software.”. This question is standard in competitive examination syllabi for Basic Php.

$10_somethings is the correct answer to “Which of the following is not valid PHP code”. This question is standard in competitive examination syllabi for Basic Php.

True is the correct answer to “PHP runs on different platforms (Windows, Linux, Unix, etc.)”. This question is standard in competitive examination syllabi for Basic Php.

gettype() is the correct answer to “You can test the type of any variable with the ..... function.”. This question is standard in competitive examination syllabi for Basic Php.

False is the correct answer to “Assigning the empty string (like ' ') to a variable automatically renders it empty.”. This question is standard in competitive examination syllabi for Basic Php.

blank string, 1 is the correct answer to “If you echo a Boolean variable, the value FALSE displays as a .... and the value TRUE echoes as a .....”. This question is standard in competitive examination syllabi for Basic Php.

True is the correct answer to “When a simple data type is casted to an array, an array is created with the original value in the first element.”. This question is standard in competitive examination syllabi for Basic Php.

both A and B is the correct answer to “String values must be enclosed in ......”. This question is standard in competitive examination syllabi for Basic Php.

False is the correct answer to “PHP does not support numbers written in hexadecimal, octal or scientific notation.”. This question is standard in competitive examination syllabi for Basic Php.