Combining php function

Question

This code works:

    $host = parse_url('http://www.cc.joomla.mywebsite.net/paypal.com/myspace.com/login.php', PHP_URL_HOST);

    $host_names = explode(".", $host);
    print_r($host_names);
    echo "<br>";
    $l = array_slice($host_names, -3);
    print_r($l);
    echo "<br>";

    $subdomain = implode(".", $l);
    echo $subdomain;    //final result

Is it possible to combine function in one line for example like this:

$subdomain = implode(array_slice (explode(".", $host)($host_names, -3)(".", $l);

The example above does not worked. I think I have seen it before where you can combine function.

Thanks in advance for any help.

You either have a hard time to formulate the expression syntactically correct or you just want to learn about writing your own php.net/language.functions <- I suggest you the latter. Because the first one is self-mockery and so you should do it your own to make you really proud. Having others write you one-liners is considered cheating in this browser game here. :D — hakre
– hakre, Commented Aug 21, 2013 at 10:25
Also, what is the goal of your function? Just to get the subdomain? — Fabor
– Fabor, Commented Aug 21, 2013 at 10:27
you might want to take a look at this stackoverflow.com/questions/535336/…, anyway :) — gherkins
– gherkins, Commented Aug 21, 2013 at 10:27
@hakre -I don't know how to combine function. deceze below explains nicely what I need. — sg552
– sg552, Commented Aug 21, 2013 at 12:43

deceze · Accepted Answer · 2013-08-21 10:28:39Z

2

Just substitute each variable with the expression that you assign to it:

$host_names = explode(".", $host);
$l = array_slice($host_names, -3);

becomes

$l = array_slice(explode(".", $host), -3);

Then

$l = array_slice(explode(".", $host), -3);
$subdomain = implode(".", $l);

becomes

$subdomain = implode(".", array_slice(explode(".", $host), -3));

answered Aug 21, 2013 at 10:28

deceze♦

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3 Comments

sg552 Over a year ago

thanks for the detail explanation. exactly the information I need.

hakre Over a year ago

hmm, this does not do the print_r's in question and does not echo the br's. I wonder how it matches the requirement in the question ... . ;)

sg552 Over a year ago

the print_r and <br> is just for example. I just need to know how to combine multiple function in single line.

Yogesh Suthar · Accepted Answer · 2013-08-21 10:28:41Z

1

You are mixing all your 3 lines into one, but it should be in this format to combine output of 1 function into another.

$subdomain = implode(".",array_slice(explode(".", $host), -3));

answered Aug 21, 2013 at 10:28

Yogesh Suthar

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Comments

OpenAI goto hell · Accepted Answer · 2013-08-21 10:28:49Z

1

You can chain funktions "like" that. But if you don't take care they care getting unreadably. Like yours and then errors are difficult to be found:

implode(array_slice (explode(".", $host)/* this is not a valid function call */($host_names, -3) /* same here*/ (".", $l);

There are so many function calls that you really don't want them all into one line. Its unreadable.

You probably want to write your own function.: http://php.net/manual/en/functions.user-defined.php

answered Aug 21, 2013 at 10:28

OpenAI goto hell

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Comments

Kumar Saurabh Sinha · Accepted Answer · 2013-08-21 10:29:10Z

1

please try this:

$host_names = implode(".", array_slice(explode(".", $host), -3));

answered Aug 21, 2013 at 10:29

Kumar Saurabh Sinha

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