PHP Print

Last update on May 28 2022 12:21:37 (UTC/GMT +8 hours)

Description

Print is used to display a string.

Syntax

print(string $val)

Parameters

val : The input data.

Return Values

Returns 1, always.

Print() is not actually a real function, it is a language construct like echo. There is some difference between the two, echo is marginally faster compare to print as echo does not return any value. Echo can accept multiple parameters without parentheses but print can accept only one parameter.

Example to display simple string with print()

<?php
print 'One line simple string.<br />';
print 'Two lines simple
string example<br />';
print 'Tomorrow I \'ll learn PHP global variables.<br />';
print 'This is a bad command : del c:\\*.* <br />';
?>

All the above print commands simply display the corresponding string, here we have used an additional html command <br /> at end of each print statement to generate a line break.

Output:

One line simple string.
Two lines simple  string example
Tomorrow I 'll learn PHP global variables.
This is a   bad command : del c:\*.*

View the example in the browser

Advance example of PHP print()

<?php
// Variables inside an echo statement.
$abc='We are learning PHP';
$xyz='w3resource.com';
print "$abc at $xyz <br />";
// Simple variable display
print $abc;
print "<br />"; // creating a new line
print $xyz;
print "<br />"; // creating a new line
// Displaying arrays
$fruits=array('fruit1'=>'Apple','fruit2'=>'Banana');
print "Fruits are : {$fruits['fruit1']} and {$fruits['fruit2']}" ;
?>

Output:

  We are learning PHP at w3resource.com
  We are learning PHP
  w3resource.com
  Fruits are : Apple and Banana

View example in the browser

Practice here online:

Previous: Echo statement
Next: $GLOBALS

PHP: Tips of the Day

How to Sort Multi-dimensional Array by Value?

Try a usort, If you are still on PHP 5.2 or earlier, you'll have to define a sorting function first:

Example:

function sortByOrder($a, $b) {
    return $a['order'] - $b['order'];
}

usort($myArray, 'sortByOrder');

Starting in PHP 5.3, you can use an anonymous function:

usort($myArray, function($a, $b) {
    return $a['order'] - $b['order'];
});

And finally with PHP 7 you can use the spaceship operator:

usort($myArray, function($a, $b) {
    return $a['order'] <=> $b['order'];
});

To extend this to multi-dimensional sorting, reference the second/third sorting elements if the first is zero - best explained below. You can also use this for sorting on sub-elements.

usort($myArray, function($a, $b) {
    $retval = $a['order'] <=> $b['order'];
    if ($retval == 0) {
        $retval = $a['suborder'] <=> $b['suborder'];
        if ($retval == 0) {
            $retval = $a['details']['subsuborder'] <=> $b['details']['subsuborder'];
        }
    }
    return $retval;
});

If you need to retain key associations, use uasort() - see comparison of array sorting functions in the manual

Ref : https://bit.ly/3i77vCC