What does <? php echo ("<pre>"); ..... echo("</pre>"); ?> mean? - php

Question

The question is the tag <pre> </pre>
I've seen one script I am working on, uses it:
echo ("<pre>");
....
....
echo ("</pre>");
What exactly does it do ?
Is it an Html tag or a PHP ?
I've searched on Google but nothing much comes out of it. When do we usually use that HTML tag?...or PHP tag?

Answer 1

The <prev> tag doesn't exist, but it's probably the <pre> HTML tag to put around debug output, to improve readability. It's not a secret PHP hack. :)

Answer 2

I think you're talking about <pre></pre>. element is displayed in a fixed-width font, and it preserves both spaces and line breaks.
try printing an array with a **<pre>** and whitout **<pre>**
$arr = array(1, 2, 3);
echo '<pre>';
print_r($arr);
echo '</pre>';
print_r($arr);

Answer 3

echo (""); is a php code, and <prev> tries to be HTML, but isn't.
As #pekka said, its probably supposed to be <pre>

Answer 4

It is nor php nor html it sounds like specific xml tag.

Answer 5

The PHP function echo() prints out its input to the web server response.
echo("Hello World!");
prints out Hello World! to the web server response.
echo("<prev>");
prints out the tag to the web server response.
echo do not require valid HTML tags. You can use PHP to print XML, images, excel, HTML and so on.
<prev> is not a HTML tag. Is is a valid XML tag, but since I don't know what page you are working in, i cannot tell you what it is. Maybe it is the root tag of a XML page, or a miswritten <pre> tag.

Answer 6

try this:
$names = array('Jesse', 'joey', 'jelnny', 'justine');
$names = new ArrayObject($names);
echo '<pre>';
print_r($names);
vs this:
$names = array('Jesse', 'joey', 'jelnny', 'justine');
$names = new ArrayObject($names);
//echo '<pre>';
print_r($names);
and it shows what the PRE does very neatly

Answer 7

The <prev>-tag might be an XML-tag.

Answer 8

if you put text within an HTML tag, all spaces and line breaks will be preserved.
Otherwise, the default behaviour is to remove multiple spaces and keep only one space, and ignore line breaks (unless you use the tag).
I'd like to say it's from the time before CSS - not necessarily used to make text more legible, only more formatted.

Answer 9

"<pre>" is an HTML tag. If you insert this line of code in your program
echo "<pre>";
then you will enable the viewing of multiple spaces and line endings. Without this, all \n, \r and other end line characters wouldn't have any effect in the browser and wherever you had more than 1 space in the code, the output would be shortened to only 1 space. That's the default HTML. In that case only with <br> you would be able to break the line and go to the next one.
For example,
the code below would be displayed on multiple lines, due to \n line ending specifier.
<?php
echo "<pre>";
printf("<span style='color:#%X%X%X'>Hello</span>\n", 65, 127, 245);
printf("Goodbye");
?>
However the following code, would be displayed in one line only (line endings are disregarded).
<?php
printf("<span style='color:#%X%X%X'>Hello</span>\n", 65, 127, 245);
printf("Goodbye");
?>

Answer 10

The <pre> is used to define pre-formatted text.
The text within <pre> tag is displayed in a fixed-width font and it preserves both spaces and line breaks that are present in the text.Here I'm printing a JSON FILE without <pre> tag and then with <pre> tag.
Without <pre> tag
https://i.stack.imgur.com/ofRn8.jpg
With <pre> tag
https://i.stack.imgur.com/XzDVg.jpg

Answer 11

$testArray = [
[
"name" => "Dinesh Madusanka",
"gender" => "male"
],
[
"name" => "Tharaka Devinda",
"gender" => "male"
],
[
"name" => "Dumidu Ranasinghearachchi",
"gender" => "male"
]
];
print_r($testArray);
echo "<pre>";
print_r($testArray);

Answer 12

here whatever we write in between the pre tags
it will be interpreted same as html pre tag
ex:
<?php
echo '<pre>';
echo '
code here
will be displayed
as it
is
namaste
';
echo "this line get printed in new line";
echo "</pre>";
echo "Now pre ended:";
echo "this line gets joined to above line";
?>
and content b/w 's font also changes.