Get all previous items from array PHP

Question

I have an array filled with these strings for example:

"1", "2", "3", "4", "5";

I have an foreach() loop, that loops through these items. It outputs all the items. Now, it outputs this:

1, 2, 3, 4, 5

But I want to output this:

1, 12, 123, 1234, 12345

How do I do this? Because the prev() function only applies to the one before the current item.

My code:

$array = array("1", "2", "3", "4", "5");
foreach ($array as $item){
    echo $item;
}

foreach($data as $key => $value) { echo implode(array_slice($data, 0, $key+1)), PHP_EOL; } or foreach(array_keys($data) as $key) { echo implode(array_slice($data, 0, $key+1)), PHP_EOL; } — Mark Baker
– Mark Baker, Commented Apr 13, 2016 at 12:24

James Lalor · Accepted Answer · 2016-04-13 13:41:22Z

6

$include = "";
foreach($array as $item) {
    echo $include . $item;
    $include .= $item;
}

Separators version:

$string = "";
$include = "";
foreach($array as $item) {
    $string .= $include . $item . ", ";
    $include .= $item;
}
echo rtrim($string, ', \t\n');

edited Apr 13, 2016 at 13:41

answered Apr 13, 2016 at 12:24

James Lalor

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7 Comments

Maarten Wolfsen Over a year ago

Really want to mark it accepted, but I have to wait five more minutes haha. And I have been busy with PHP for some time now, that's why I got very frustrated for not knowing this :p

James Lalor Over a year ago

Sometimes the simplest solutions just don't come to mind, I almost over complicated this myself.

Random Over a year ago

What about separators ?

James Lalor Over a year ago

I'm sure he's smart enough to figure out separators :) - but, just for you ;)

James Lalor Over a year ago

Also for reference, the code he provided didn't have separators ;)

|

AbraCadaver · Accepted Answer · 2016-04-13 14:42:19Z

2

Concatenate the current item each time through:

$output = '';
foreach ($array as $item){
    $output .= $item;
    echo $output;
}

For a comma separated list you can create an array and implode:

$items = '';
foreach ($array as $item){
    $items .= $item;
    $output[] = $items;
}
echo implode(', ', $output);

edited Apr 13, 2016 at 14:42

answered Apr 13, 2016 at 12:25

AbraCadaver

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2 Comments

Random Over a year ago

What about separators... ?

Random Over a year ago

Yay ! So much better :)

6be709c0 · Accepted Answer · 2016-04-13 12:35:42Z

1

$array = array("1", "2", "3", "4", "5");
$value = '';

foreach ($array as $item){
    $value .= $item;
    echo $value;
}

edited Apr 13, 2016 at 12:35

answered Apr 13, 2016 at 12:25

6be709c0

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2 Comments

Jay Blanchard Over a year ago

Why should the OP try this? A good answer will always have an explanation (and is never just code only) of what was done and why it was done in such a manner, not only for the OP but for future visitors to SO.

Random Over a year ago

@MathieuLescaudron If you take note, please add explainations of what you do, not just code. By the way this does not provide the expected output... Missing separators etc...

Shay Altman · Accepted Answer · 2016-04-13 13:16:36Z

1

concatination in php be executed by .(point)

$array = array("1", "2", "3", "4", "5");
$temp = '';
$output = '';
foreach ($array as $item){
    $temp .= $item;
    $output .= $temp . ',';
}
echo rtrim($output,',');

edited Apr 13, 2016 at 13:16

answered Apr 13, 2016 at 12:25

Shay Altman

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1 Comment

Jay Blanchard Over a year ago

Why should the OP try this? A good answer will always have an explanation (and is never just code only) of what was done and why it was done in such a manner, not only for the OP but for future visitors to SO.

James Paterson · Accepted Answer · 2016-04-13 12:25:05Z

0

$array = array("1", "2", "3", "4", "5");
$concatItem = "";
foreach ($array as $item){
    $concatItem = $concatItem.$item;
    echo $concatItem;
}

answered Apr 13, 2016 at 12:25

James Paterson

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2 Comments

Jay Blanchard Over a year ago

Why should the OP try this? A good answer will always have an explanation (and is never just code only) of what was done and why it was done in such a manner, not only for the OP but for future visitors to SO.

Random Over a year ago

What about separators ?

Samir Sheikh · Accepted Answer · 2016-04-13 13:35:17Z

0

use like this way...

<?php

$array = array("1", "2", "3", "4", "5");
$separate = $array;
$series =' ';


foreach ($array as $item){
    $series .=$item;
    echo $series;
    if (next($separate )) {
        echo ','; // Add comma for all elements instead of last
    }
}

?>

Output..

answered Apr 13, 2016 at 13:35

Samir Sheikh

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