30 plus interview question & answer on PHP and laravel ?

30 plus interview question & answer on PHP and laravel ?

Most of the interviewer are make simple mistake in interview board to give some common question. Today I will discuss 30 plus interview question and answer for web and software developer who work on php and laravel profession.

Q. What is PHP?

Stands for "Hypertext Preprocessor." It was originally created by Rasmus Lerdorf in 1994

Q: What does $GLOBALS mean?

   $GLOBALS is associative array including references to all variables which are currently defined in the global scope of the script.

Q: What does $_SERVER mean?

   $_SERVER is an array including information created by the web server such as paths, headers, and script locations.

Q: What does $_FILES means?

  $_FILES is an associative array composed of items sent to the current script via the HTTP POST method.

PEAR (PHP Extension and Application Repository) is a framework and repository for reusable PHP components. PEAR is a code repository containing all kinds of php code snippets and libraries.

Q: The only differences are echo and print

1.   echo does not return a value whereas print does return a value of 1 (this enables print to be used in expressions).

2.   echo can accept multiple parameters (although such usage is rare) while print can only take a single argument.


Q: What is the difference between include_once() and require_once(), which one would you use in circumstances where you need to connect to a database, and why?

include_once() or include allows a file to be included, and in cases where the file is missing or has the wrong name, we receive an error message and execution will still continue regardless.
On the other hand, require_once() or require would be suitable in cases where a file needs to be included once and if it is missing or has a wrong name then we receive a fatal error and the execution of the program stops.

Q: How can you tell if a number is even or odd without using any condition or loop?

$arr=array("0"=>"Even","1"=>"Odd");
$check=13;
echo
"Your number is: ".$arr[$check%2];

$a = "PHP";
$a = $a + 1;
echo $a;

<?php
echo "Cat";
echo "Dog" // give an parse error
echo "Lion";
?>

<?php
function fun1(){
{
echo "Vineet Saini";
}
fun2(); // undefined function 
}
fun2(); // undefined function 
echo "Fatal Error !!";
?>

3.   Warning Error.: include a missing file or using the incorrect number of parameters in a function.

<?php
echo "Warning Error!!";
include ("Welcome.php");
?>

<?php
$a="Vineet
kumar saini";
echo "Notice Error !!";
echo $b;
?>

Indexed array: The array which contains numeric index.

Syntax:
array( val1, val2, val3, ... )

Syntax:
array( key=>val, key=>val, key=>value, ... )

Syntax:
array( array( val11, val12, ...)
       array( val21, val22, ...)
       ... )

sort() - sort arrays in ascending order
rsort() - sort arrays in descending order
asort() - sort associative arrays in ascending order, according to the value
ksort() - sort associative arrays in ascending order, according to the key
arsort() - sort associative arrays in descending order, according to the value
krsort() - sort associative arrays in descending order, according to the key

Q. How many PHP Conditional Statements?
if statement - executes some code if one condition is true
if...else statement - executes some code if a condition is true and another code if that condition is false
if...elseif...else statement - executes different codes for more than two conditions
switch statement - selects one of many blocks of code to be executed

<?php
$t = date("H");
if ($t < "10") {
    echo "Have a good morning!";
} elseif ($t < "20") {
    echo "Have a good day!";
} else {
    echo "Have a good night!";
}
?>

<?php
$favcolor = "green";
switch ($favcolor) {
    case
"red":
       
echo "Your favorite color is red!";
       
break;
    case
"blue":
       
echo "Your favorite color is blue!";
       
break;
    case
"green":
       
echo "Your favorite color is green!";
       
break;
   
default:
       
echo "Your favorite color is neither red, blue, nor green!";
}
?>

while - loops through a block of code as long as the specified condition is true
do...while - loops through a block of code once, and then repeats the loop as long as the specified condition is true
for - loops through a block of code a specified number of times
foreach - loops through a block of code for each element in an array

<?php
$x = 1;
while($x <= 5)
{
    echo "The number is: $x <br>";
    $x++; // Increase the loop counter value by 1 for each iteration
$x+=10; //Increase the
loop counter value by 10 for each iteration
}
?>

<?php
$x = 6;
do {
    echo "The number is: $x <br>";
    $x++;
} while ($x <= 5);
?>
# for loop
<?php
for ($x = 0; $x <= 100; $x+=10) {
    echo "The number is: $x <br>";
}
?>

<?php
$colors = array("red", "green", "blue", "yellow");
foreach ($colors as $value) {
  echo "$value <br>";
}
?>

<?php
function familyName($fname, $year) {
    echo "$fname Refsnes. Born in $year
<br>";
}
familyName("Hege", "1975");
familyName("Stale", "1978");
familyName("Kai Jim", "1983");
?>
Output
Hege
Refsnes. Born in 1975
Stale Refsnes. Born in 1978
Kai Jim Refsnes. Born in 1983

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