[SOLVED] Is there a more efficient way to extract links from an array of strings?

Is there a more efficient way to extract links from an array of strings?

I run (Real Estate RETS) queries that will only return objects. The contents of these objects appear to be strings that contain different types of information about sets of images (ie. several different pictures from the same house). All I want is the link to each picture ("Location:" in the sample below), put into an array that I can use elsewhere in the script.

I have figured out how to accomplish this using a nested set of explode() commands, but I was wondering if there is a more direct, efficient way to do this: something like ltrim(delete everything to the end of the word "Location: "), and then rtrim(delete everything after ".jpg") leaving me with each value in an array like $picturelinks.

Here is a sample of the data I'd like to do this with.

Array (
    [1] => WhateverGibberish
    Content-Type: image/jpeg
    Content-ID: bunchofnumbers
    Object-ID: 1
    Location: http://cdn.photos.sparkplatform.com/met/347305719000000-o.jpg
    Content-Description: Welcome
    Preferred: 1
    
    [2] => WhateverGibberish
    Content-Type: image/jpeg
    Content-ID: bunchofnumbers
    Object-ID: 2
    Location: http://cdn.photos.sparkplatform.com/met/350148712000000-o.jpg
    Content-Description: Welcome home
    
    [3] => WhateverGibberish
    Content-Type: image/jpeg
    Content-ID: bunchofnumbers
    Object-ID: 3
    Location: http://cdn.photos.sparkplatform.com/met/351982042000000-o.jpg
    Content-Description: Brick

    [4] => WhateverGibberish
    Content-Type: image/jpeg
    Content-ID: bunchofnumbers
    Object-ID: 4
    Location: http://cdn.photos.sparkplatform.com/met/353549178000000-o.jpg
    Content-Description: Brix
)

Here is the php code that does accomplish the task, but I wonder if there is a method that would run faster:

<?php
$photos = $rets->GetObject("Property", "HiRes", $sysid, "*", 1); //1 gets links
foreach($photos as $photo) { //array includes everything for all photos      
    unset ($photo['Success']); //not needed
    unset ($photo['Content-Type']); //not needed
    unset ($photo['Length']); //not needed
        
    $pile=explode('--',$photo['Data']);
    unset ($pile[0]);
    foreach ($pile as $blah) {
        $subpile=explode('Location: ',$blah);
        $picstuff[]=$subpile[1];
    }
    foreach($picstuff as $piclilnk) {
        $breakme=explode('Content-Description: ',$piclilnk);
        $linksonly[]=$breakme[0];
        $otherstuff[]=$breakme[1];
    }
    //print_r($linksonly);
    //print_r($otherstuff);
?>

Solution

Use a regular expression to find the lines that begin with Location: and extract the rest of the line using a capture group.

foreach ($pile as $p) {
    if (preg_match('/^\s*location:\s*(.*)/im', $p, $match)) {
        $linksonly[] = $match[1];
    }
}

If you need other values you can extract them similarly.