Output of PHP programs | Set 3
Last Updated :
16 Jan, 2023
Predict the output of below PHP programs:
Question 1
<?php
$number = array(0, 1, one, two, three, 5);
$num = preg_grep("/[0-5]/", $number);
print_r($num);
?>
|
Options:
- Array([0]=>0 [1]=>1 [2]=>one [3]=>two [4]=>three [5]=>5)
- Array([2]=>one [3]=>two [4]=>three)
- Array([1]=> 1)
- Array([0]=>0 [1]=>1 [5]=>5)
Output:
Array([0]=>0 [1]=>1 [5]=>5)
Explanation: The preg_grep() function is used to search an array for specific patterns and then return a new array based on that filtering.
Question 2
<?php
$number = array(0, 1, one, two, three, 5);
$num = preg_grep("/[0-5]/", $number, PREG_GREP_INVERT);
print_r($num);
?>
|
Options:
- Array([0]=>0 [1]=>1 [2]=>one [3]=>two [4]=>three [5]=>5)
- Array([2]=>one [3]=>two [4]=>three)
- Array([1]=> 1)
- Array([0]=>0 [1]=>1 [5]=>5)
Output:
Array([2]=>one [3]=>two [4]=>three)
Explanation: When we include PREG_GREP_INVERT, this will invert our data, so instead of outputting numbers it will output our non-numeric values.
Question 3
<?php
$name = "I am intern at GeeksforGeeks.";
if (preg_match("/at/",$name))
echo "My name is Sagar Shukla";
else
echo "My name is not Sagar Shukla";
?>
|
Options:
- My name is Sagar Shukla
- My name is not Sagar Shukla
- Error
- No Output
Output:
My name is Sagar Shukla
Explanation: The code uses preg_match() to check for a keyword and replies based on whether it is true (1) or false (0).
Question 4
<?php
$name = "I am intern at GeeksforGeeks.";
if (preg_match("/was/",$name))
echo "My name is Sagar Shukla";
else
echo "My name is not Sagar Shukla";
?>
|
Options:
- My name is Sagar Shukla
- My name is not Sagar Shukla
- Error
- No Output
Output:
My name is not Sagar Shukla
Explanation: The code uses preg_match to check for a keyword and replies based on whether it is true (1) or false (0).
Question 5
<?php
$str = "I am intern at GeeksforGeeks";
$find = array('/am/');
$replace = array('was');
echo preg_replace ($find, $replace, $str);
?>
|
Options:
- I am intern at GeeksforGeeks
- I was intern at GeeksforGeeks
- Error
-
- No Output
Output:
I was intern at GeeksforGeeks
Explanation: In the above program, am replaced with was as preg PHP function is used to do a find and replace on a string or an array.
Question 6
<?php
$str = "I am intern at GeeksforGeeks";
$find = array('/geeksforgeeks/');
$replace = array('GEEKSFORGEEKS');
echo preg_replace ($find, $replace, $str);
?>
|
Options:
- I am intern at GeeksforGeeks
- I am intern at GEEKSFORGEEKS
- Error
- No Output
Output:
I am intern at GeeksforGeeks
Explanation: GeeksforGeeks was not replaced because the preg_replace function is case sensitive. Therefore it treats GeeksforGeeks and geeksforgeeks differently.
Question 7
<?php
$line = "Hello. Welcome to GeeksforGeeks!";
$sen = preg_split('/\./', $line);
print_r($sen);
?>
|
Options:
- Hello. Welcome to GeeksforGeeks!
- Array([0]=> Hello. Welcome to GeeksforGeeks!)
- Array([0]=> Hello [1]=> Welcome to GeeksforGeeks! )
- Error
Output:
Array([0]=> Hello [1]=> Welcome to GeeksforGeeks! )
Explanation: We use a ‘.’ period to split the data, therefore giving each sentence it’s own array entry.
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