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php.js : print_r() function

print_r() function

The print_r() function is used to display information about a variable.

Version:

1103.1210

Syntax:

print_r(variable1, return_val)

Parameters:

Name Description Required /
Optional
Type
variable1 The variable being checked Required Mixed*
return_val Use return parameter to capture the output of print_r(). Optional Boolean

*Mixed : mixed indicates that a parameter may accept multiple (but not necessarily all) types.

Example : php.js print_r() function

In the following web document, print_r() functions display information of various variables.

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
<title>php.js : print_r() function example</title>
<script type="text/javascript" src="../../phpjs/variable/variable.min.js"> </script>
</head>
<body>
<h1 style="color: green">php.js : print_r() function example</h1>
<h3>Outputs a variable.</h3>
<hr />
<script type="text/javascript">
//This is done to make the following JavaScript code compatible to XHTML. <![CDATA[
var_name1=678;
var_name2="a678";
var_name3="678";
var_name4="W3resource.com";
var_name5=698.99;
var_name6=125689.66;
var_array=new Array(99,'w3resource',67899.99);
print_r(var_name1);
document.write('<br />');
print_r(var_name2);
document.write('<br />');
print_r(var_name3);
document.write('<br />');
print_r(var_name4);
document.write('<br />');
print_r(var_name5,var_name6);
//]]>
</script>
</body>
</html>

Output of the example:

678
a678
678
W3resource.com
698.99

View example of php.js print_r() function in browser

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