OUTPUT FUNCTIONS IN PHP

1. print – This function displays output on browser and returns value true if output is printed successfully, otherwise it returns false.

Example –

<?php

$rv = print "Rakesh";

print "<br>";

print $rv; // It returns either true or false

?>

Output –

Rakesh

1

2. echo – It is same as print, but it does not return any value so that its performance is faster than print function. We can also print multiple statements with an echo function.

Example –

<?php

echo "Scott"," Smith"," Alex";

?>

Output –

Scott Smith Alex

3. var_dump – Using this function we can display the value of variables along with datatypes.

Example –

<?php

$x=100;

$y="Scott";

var_dump($x);

var_dump($y);

?>

Output –

int(100)

string(5) "Scott"

4. printf – Using this function, we can print variables with the help of format specifier.

Example –

<?php

$x=100;

$y="Scott";

printf("%d ",$x);

printf("%s",$y);

?>

Output –

100 Scott

5. print_r – Using this function, we can display all elements of array and properties of object.

Example –

<?php

$arr=array(10,20,30);

print_r($arr);

?>

Output –

Array

(

    [0] => 10

    [1] => 20

    [2] => 30

)

Note – On viewing the source code, the array is shown systematically on the screen.