php code explanation

[zaahideen]

im quite new to php coding and still learning. just wanted some explanation on a line of coding:

$content = str_ireplace ( '{user_name}', $sale->user->name, $content );

could some one please break up the different parts of this code and explain what they mean.

thanks

[Beverleyh]

You should really be looking in the PHP manual for a description and examples that illustrate how the function works: http://php.net/manual/en/function.str-ireplace.php

Or you may find this slightly easier to understand: http://www.w3schools.com/php/func_string_str_ireplace.asp

[zaahideen]

ok thanks but what does $content refer to? is it a field in the database?

also what does $sale->user->name refer to?

thanks

[Beverleyh]

Don’t know – it’s your website.
Look at the code to see where the variables originate – maybe there are comments that explain. Or is there documentation to refer to? Or try echoing it out to see what the variables print. I would expect that their naming conventions will correspond to something logically related in your database.

[I.m.learning]

Anything that begins with a dollar sign is a variable. From your example, $content is being used as a recursive code

To explain recursive, if you don’t already know:
PHP is recursive; it stands for PHP: Hypertext Preprocessor

Another example is the name BRIAN as a recursive acronym
Brian
Really
Is
A Noun

Variable example:
<?php
$txt = “Hello world!”;
echo $txt;
?>

The result is: Hello world!

The forward arrow is used when referring to the attributes of an instantiated object.

This calls a function:
$variable->my_function();

This accesses a property:
$variable->name = ‘property’;

Curly braces = Complex (curly) syntax:

http://php.net/manual/en/language.types.string.php#language.types.string.parsing.complex

Any scalar variable, array element or object property with a string representation can be included via this syntax. Simply write the expression the same way as it would appear outside the string, and then wrap it in { }.

PHP.net is a really confusing site for some explanations; however, there are always examples to view for a visual aid.

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