PHP Convert Array To String

Question

This my array:

$info = array( 
    "setA" => array ( "start" => 0, "end" => 0 ),
    "setB" => array ( "start" => 100, "end" => 300 ),
    "setC" => array ( "start" => 0, "end" => 0 ),
    "setD" => array ( "start" => 500, "end" => 1000 ),
    "setE" => array ( "start" => 0, "end" => 0 ),
    "setF" => array ( "start" => 0, "end" => 0 ),
    "setG" => array ( "start" => 0, "end" => 0 )
);

How can I convert this so an echo command produces:

setA 0 - 0
setB 100 - 300
setC 0 - 0
setD 500 - 1000
setE 0 - 0
setF 0 - 0
setG 0 - 0

I've tried various things including the following, but nothing comes close.

array_walk_recursive($info, function($v) use (&$result) {
                    $result[] = $v;
                });
                echo implode('<br>', $result);

Any ideas ? Thanks

In before "No of course I know about foreach, but my actual scenario is more complex". — CodeCaster
– CodeCaster, Commented Aug 21, 2017 at 12:58
@Progrock the answer is obvious (as long as you know the most basic control structures of PHP) and there are many questions that are near-duplicates, for example this one or that one. So while I'm not saying this should be downvoted, I think downvoting it isn't wrong either. — domsson
– domsson, Commented Aug 21, 2017 at 13:06
If you are new to Php and arrays the manual (array and book.array) doesn't exactly make it clear that foreach is the defacto common Php way to iterate through array structures. — Progrock
– Progrock, Commented Aug 21, 2017 at 13:09
With all due respect, but if you haven't come across foreach yet you need to study some sort of introduction to PHP, not ask on SO. — deceze
– deceze ♦, Commented Aug 21, 2017 at 13:14

OK sure · Accepted Answer · 2017-08-21 12:54:45Z

1

Just a foreach loop should do it:

foreach ($info as $set => $range) {
    echo $set . ' ' . $range['start'] . ' - ' . $range['end'] . '<br />';
}

answered Aug 21, 2017 at 12:54

OK sure

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1 Comment

Tom Over a year ago

Thanks for some reason I'd not thought to use foreach. I think I was overcomplicating this.

Progrock · Accepted Answer · 2017-08-21 12:57:00Z

1

<?php
$info = array( 
    "setA" => array ( "start" => 0, "end" => 0 ),
    "setB" => array ( "start" => 100, "end" => 300 ),
    "setC" => array ( "start" => 0, "end" => 0 ),
    "setD" => array ( "start" => 500, "end" => 1000 ),
    "setE" => array ( "start" => 0, "end" => 0 ),
    "setF" => array ( "start" => 0, "end" => 0 ),
    "setG" => array ( "start" => 0, "end" => 0 )
);

foreach($info as $key => $value) {
    printf("%s %d - %d\n", $key, $value['start'], $value['end']);
}

Output:

setA 0 - 0
setB 100 - 300
setC 0 - 0
setD 500 - 1000
setE 0 - 0
setF 0 - 0
setG 0 - 0

answered Aug 21, 2017 at 12:57

Progrock

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Comments

Rahul · Accepted Answer · 2017-08-21 12:54:49Z

0

Here is the code,

foreach($info as $key => $value){
    echo $key." ". $value['start']." - ".$value['end'];
}

Its simple foreach loop to traverse through your array.

answered Aug 21, 2017 at 12:54

Rahul

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2 Comments

domsson Over a year ago

This is exactly the same as the first answer.

Rahul Over a year ago

Correct! But I would know before posting the answer, I would have never posted.

Sarkouille · Accepted Answer · 2017-08-21 12:56:57Z

0

That's simple, use a foreach. This control structure is made precisely to iterate on arrays :

foreach ($info as $key => $val) {
    echo $key, ' ', $val['start'], ' - ', $val['end'], '<br>';
}

answered Aug 21, 2017 at 12:56

Sarkouille

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4 Comments

OK sure Over a year ago

@domsson we need a foreach for the answers on this one.

Sarkouille Over a year ago

@domsson You are indeed wrong, the answer is present 6 times while I'm writing this, and not 4. That is the kind of things that happens when people are allowed to write on the same page at the same time. ;) EDIT : by looking at the other answers, it seems that you aren't against duplicates when it comes to your comments.

Progrock Over a year ago

Oh come on @ksjohn uses commas for multiple echo params instead of concatenating strings. Totally different!

Sarkouille Over a year ago

. is the concatenating operator while , is the argument separating operator. echo can take more than one parameter. You can either concatenate all the pieces in one string, pass each of them as a distinct argument or a little of both. Since the most notable difference in situations where both ways are equivalent is that concatenations are greedier than multiple arguments, I tend to not concatenate.

Jean-Luc Aubert · Accepted Answer · 2017-08-21 12:57:47Z

0

Just loop through your array :

$result = "";
foreach($info as $key => $content){
    $result .= $key . " ";
    foreach($content as $bounce => $value){
        $result .= $value . "-";
    }
    $result = substr($result, 0, strlen($result) - 1) . "<br />\n;
}
echo $result;

Think it will do the job.

answered Aug 21, 2017 at 12:57

Jean-Luc Aubert

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3 Comments

Progrock Over a year ago

Think? Did you try it? No. If you did you'd have stumbled across the syntax error.

Progrock Over a year ago

Plus one for the most obtuse answer.

Jean-Luc Aubert Over a year ago

Didn't try... but, except syntax error, the algo is correct... and yes, the line after the second loop is incorrect

Jigar Shah · Accepted Answer · 2017-08-21 12:58:32Z

0

foreach would be easier to use

$info = array( 
    "setA" => array ( "start" => 0, "end" => 0 ),
    "setB" => array ( "start" => 100, "end" => 300 ),
    "setC" => array ( "start" => 0, "end" => 0 ),
    "setD" => array ( "start" => 500, "end" => 1000 ),
    "setE" => array ( "start" => 0, "end" => 0 ),
    "setF" => array ( "start" => 0, "end" => 0 ),
    "setG" => array ( "start" => 0, "end" => 0 )
);

foreach ($info as $key => $value) {
    echo $key.' '.$value['start'].' - '.$value['end'].'</br>';
}

Output:

setA 0 - 0
setB 100 - 300
setC 0 - 0
setD 500 - 1000
setE 0 - 0
setF 0 - 0
setG 0 - 0

edited Aug 21, 2017 at 12:58

answered Aug 21, 2017 at 12:55

Jigar Shah

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3 Comments

domsson Over a year ago

Exactly the same as the other three answers.

Jigar Shah Over a year ago

if you look at timing, it is also same, update answer :)

Progrock Over a year ago

Strange html breaking element you've got there. And I see no </br>s in your output.

Progrock · Accepted Answer · 2017-08-21 15:20:46Z

Personally I'd iterate through the array with foreach, but you were almost there with your array_walk example (use array_walk instead of array_walk_recursive).

<?php
$result = [];
array_walk($info, function($v, $k) use (&$result) {
    $result[] = $k . ' ' . $v['start'] . ' - ' . $v['end'];
});
echo implode('<br>', $result);

Outputs:

setA 0 - 0<br>setB 100 - 300<br>setC 0 - 0<br>setD 500 - 1000<br>setE 0 - 0<br>setF 0 - 0<br>setG 0 - 0

You could have skipped building an array and then imploding by echoing out within the array_walk callback.

<?php
array_walk($info, function($v, $k) {
    echo $k . ' ' . $v['start'] . ' - ' . $v['end'] . "\n";
});

But as you can see the foreach is even simpler.

foreach($info as $k => $v) {
    echo $k . ' ' . $v['start'] . ' - ' . $v['end'] . "\n";
}

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