PHP Replace multiple string within foreach loop

Question

I'm grabbing the source of a page with a lot of PDF links (files) listed in a column like so. simple_php_dom.php

TALB20170826D-$A$$-RA11.pdf
TAP$20170826D-$A$$-RA11.pdf
TASD20170826D-$A$$-RA11.pdf
TAUA20170826D-$A$$-RA11.pdf
TAUB20170826D-$A$$-RA11.pdf
TAUC20170826D-$A$$-RA11.pdf
TAUD20170826D-$A$$-RA11.pdf
TBTP20170826D-$A$$-RA11.pdf
TCBY20170826D-$A$$-RA11.pdf

I need to rename them within the foreach loop

foreach($html->find('a') as $element) 
echo $element->href;

For instance TALB is an abbreviation for ALBANY, TAP is an abbreviation for Asia Pacific and so on.

I have a list of the names that correspond with the abbreviations but unsure how to rename them within the loop? Any help would be greatly appreciated!

ishegg · Accepted Answer · 2017-08-24 18:33:20Z

4

You can put the list of replacements in arrays:

<?php    
/*
$list = [];   
$list[] = "TALB20170826D-\$A$$-RA11.pdf";
$list[] = "TAP$20170826D-\$A$$-RA11.pdf";
$list[] = "TASD20170826D-\$A$$-RA11.pdf";
$list[] = "TAUA20170826D-\$A$$-RA11.pdf";
$list[] = "TAUB20170826D-\$A$$-RA11.pdf";
$list[] = "TAUC20170826D-\$A$$-RA11.pdf";
$list[] = "TAUD20170826D-\$A$$-RA11.pdf";
$list[] = "TBTP20170826D-\$A$$-RA11.pdf";
$list[] = "TCBY20170826D-\$A$$-RA11.pdf";
*/
$list = $html->find('a');
$abbr = [
    "TALB",
    "TAP",
    // ...
];
$replacements = [
    "ALBANY",
    "Asia Pacific",
    // ...
];
foreach ($list as &$el) {
    $el->href = str_replace($abbr, $replacements, $el->href);
}

Demo

Or, to keep them all in one associative array (order doesn't matter and missing items just won't be replaced, no errors):

<?php    
/*$list = [];   
$list[] = "TALB20170826D-\$A$$-RA11.pdf";
$list[] = "TAP$20170826D-\$A$$-RA11.pdf";
$list[] = "TASD20170826D-\$A$$-RA11.pdf";
$list[] = "TAUA20170826D-\$A$$-RA11.pdf";
$list[] = "TAUB20170826D-\$A$$-RA11.pdf";
$list[] = "TAUC20170826D-\$A$$-RA11.pdf";
$list[] = "TAUD20170826D-\$A$$-RA11.pdf";
$list[] = "TBTP20170826D-\$A$$-RA11.pdf";
$list[] = "TCBY20170826D-\$A$$-RA11.pdf";*/
$list = $html->find('a');
$abbr = [
    "TALB" => "ALBANY",
    "TAP" => "Asia Pacific",
];
foreach ($list as &$el) {
    $el->href = strtr($el->href, $abbr);
}

Demo

Or use array_map(), maybe you'll find it a bit cleaner:

$list = array_map(function($el) use($abbr) {
    return strtr($el, $abbr);
}, $list);

edited Aug 24, 2017 at 18:33

answered Aug 24, 2017 at 18:08

ishegg

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5 Comments

Charles Butler Over a year ago

Will this work if the abbreviations aren't in order or sometimes not listed?

ishegg Over a year ago

It won't with the first way, but I edited in another way of doing it which will do it the way you want it to.

Charles Butler Over a year ago

That works! Now how would I get the pdf link names into the $list = [] array? For instance, the date within the string will change everyday I grab the links.

ishegg Over a year ago

I'm not sure what you mean. Where are you getting the list from? You should post a new question though, to keep things organized.

ishegg Over a year ago

I've edited, now the $list comes directly from $html->find('a').

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