join texts of variables

[lindm]

got the following function I need help to complete:

function sign() {
$num = func_num_args(); 

		for( $i = 0; $i < $num; ++$i ) {
        if value of variable != '' merge to $total=xxxxx
    }

    return $total;
}

print sign('','hello ','how ','are you?);

 

The output should be: hello how are you?

In other words the variables with values should be joined together. Can't get the xxx of the functions working.

 

[mikesta707]

why don't you just use implode?

echo implode(" ", array("hello", "how", "are", "you"));

[lindm]

Well the variables are mysql queries like:

 

sign($row['one'],$row['two'],$row['three']);

 

So all results with a value should be joined to a new variable.

[thebadbad]

As mikesta707 suggests, you can simply implode() the array returned by func_get_args() inside the function. No need for func_num_args() and the for loop.

 

<?php
function sign() {
return implode('', func_get_args());
}
?>

[lindm]

To complicate things I need to add a html tag around each variable like:

 

<span>row['one']</span>

 

Not sure your suggestion works?

[mikesta707]

function sign() {
return "<span>".implode('</span><span>', func_get_args())."</span>";
}

 

should work. untested though

[lindm]

Works great! But...I was hoping to avoid the span tags for variables without any value. So

 

sign('','','test') would not return <span></span><span></span><span>test</span>

but instead <span>test</span>

[thebadbad]

To complicate things I need to add a html tag around each variable like:

 

<span>row['one']</span>

 

Not sure your suggestion works?

 

Why didn't you specify that in your original post? Would get your problem solved faster.

 

But mikesta707's code should work. If you don't want to wrap blank vars in span tags, you can loop through each argument:

 

<?php
function sign() {
$return = '';
foreach (func_get_args() as $arg) {
	if ($arg != '') {
		$return .= "<span>$arg</span>";
	}
}
return $return;
}
?>

[mikesta707]

ahh man, now it can't be a 1 line function

function sign() {
$string = "";
foreach(func_get_args() as $args){
$string .= (str_len($args) > 0) ? "<span>".$args."</span>" : "";
}
return $string;
}

 

dam badbad, always beating me. Oh well, our solutions are exactly the same, but mines a little short 

[lindm]

Wonderful! Many thanks!

[thebadbad]

dam badbad, always beating me. Oh well, our solutions are exactly the same, but mines a little short 

Mine would be even shorter (great joke potential right here) by using the ternary operator as well. And of course it can be a one line function:

 

function sign() {$return = ''; foreach (func_get_args() as $arg) {$return .= ($arg != '') ? "<span>$arg</span>" : '';} return $return;}

LOL

[mikesta707]

lol.

 

I suppose an obligatory "thats what she said" is in order

[salathe]

ahh man, now it can't be a 1 line function

Sure it can

 

function sign() {
return vsprintf(str_repeat("<span>%s</span>", count($args = array_filter(func_get_args(), "strlen"))), $args);
}

 

 

[thebadbad]

Clever, although it complaints that func_get_args() can't be used as a function parameter

[salathe]

Clever, although it complaints that func_get_args() can't be used as a function parameter

 

Use a newer version of PHP (5.3.0 or above) or move it out of the parameter:

 

function sign() {
return ($a = func_get_args()) ? vsprintf(str_repeat("<span>%s</span>", count($args = array_filter($a, "strlen"))), $args) : "";
}

[thebadbad]

Ah, thought it might have something to do with the version.