Breaking with a divider if more than one inside foreach - php

Question

$linkPairs returns the following:
array (size=2)
0 => string 'Test|https://www.test2.com' (length=26)
1 => string 'Test2|http://www.test2.com/' (length=27)
How would I be successful on breaking the links using a divider as this: Test | Test2 .. the format that I'm getting now is TestTest2.
So I have the following code:
$linkPairs = explode(",", $atts['link']); // separate the pairs
$output = '';
$output .= '<li class="slide">
<p><img src="' . esc_url($atts['image']) . '" alt="" /></p>
<p>'. $atts['headline'] .'</p>
<p>'. $atts['body'] .'</p>';
foreach($linkPairs as $linkPair) {
$pair = explode("|", $linkPair); // separate the title and url
$output .= '' . $pair[0] . '';
}
$output .= '</li>';

Answer 1

One method to do it, would be add the links to an array, and implode them with what you wish to have separate them:
$output .= '<li class="slide">
<p><img src="' . esc_url($atts['image']) . '" alt="" /></p>
<p>'. $atts['headline'] .'</p>
<p>'. $atts['body'] .'</p>';
$hrefs = array();// define and clean for this item
foreach($linkPairs as $linkPair) {
$pair = explode("|", $linkPair); // separate the title and url
$hrefs[] = '' . $pair[0] . '';
}
$output .= implode(' | ',$hrefs);// implode them here
$output .= '</li>';
The imploded pipe, is not to be confused with the original pipe used in the raw data you work with. You mentioned you wanted to space your hrefs with a pipe, so that is the example above.

Answer 2

Update your foreach to add the divider, then rtrim() the last one
$divider = ' | ';
foreach($linkPairs as $linkPair) {
$pair = explode("|", $linkPair); // separate the title and url
$output .= '' . $pair[0] . ''.$divider;
}
$output = rtrim($output,$divider);

Answer 3

since it's good to know all possible ways you can also do the following count number of elements inthe linkPairs array then track the array pointer location to know the last link so that you don't add | to the last entry. I have explained everything i added in comment infront of the line.
$linkPairs = explode(",", $atts); // separate the pairs
$output = '';
$output .= '<li class="slide">
<p><img src="' . esc_url($atts['image']) . '" alt="" /></p>
<p>'. $atts['headline'] .'</p>
<p>'. $atts['body'] .'</p>';
$li=count($linkPairs);//number of element of array
$i=1;//track the current location of array_pointer
foreach($linkPairs as $linkPair) {
if($i!=$li){
$symbol="|";//add | if the link is not the last link
}
else {
$symbol="";//add nothing if the link is the last link
}
$pair = explode("|", $linkPair); // separate the title and url
$output .= '' . $pair[0] . ''.$symbol;//$symbol is used to add | to the link
$i++;
}
$output .= '</li>';