Using str_replace() With Array Values Giving Unexpected Results - php

Question

Using str_replace() to replace values in a couple paragraphs of text data, it seems to do so but in an odd order. The values to be replaced are in a hard-coded array while the replacements are in an array from a query provided by a custom function called DBConnect().
I used print_r() on both to verify that they are correct and they are: both have the same number of entries and are in the same order but the on-screen results are mismatched. I expected this to be straightforward and didn't think it needed any looping for this simple task as str_replace() itself usually handles that but did I miss something?
$replace = array('[MyLocation]','[CustLocation]','[MilesInc]','[ExtraDoc]');
$replacements = DBConnect($sqlPrices,"select",$siteDB);
$PageText = str_replace($replace,$replacements,$PageText);
and $replacements is:
Array
(
[0] => 25
[MyLocation] => 25
[1] => 45
[CustLocation] => 45
[2] => 10
[MilesInc] => 10
[3] => 10
[ExtraDoc] => 10
)

Answer 1

Once I saw what the $replacements array actually looked like, I was able to fix it by filtering out the numeric keys.
$replace = array('[MyLocation]','[CustLocation]','[MilesInc]','[ExtraDoc]');
$replacements = DBConnect($sqlPrices,"select",$siteDB);
foreach ($replacements as $key=>$value) :
if (!is_numeric($key)) $newArray[$key] = $value;
endforeach;
$PageText = str_replace($replace,$newArray,$PageText);
The former $replacements array, filtered to $newArray, looks like this:
Array
(
[MyLocation] => 25
[CustLocation] => 45
[MilesInc] => 10
[ExtraDoc] => 10
)

Answer 2

-- edited: Removed some non sense statements --
#DonP, what you are trying to do is possible.
In my opinion, the strtr() function could be more beneficial to you. All you need to make a few adjustments in your code like this ...
<?php
$replacements = DBConnect($sqlPrices,"select",$siteDB);
$PageText = strtr($PageText, [
'[MyLocation]' => $replacements['MyLocation'],
'[CustLocation]' => $replacements['CustLocation'],
'[MilesInc]' => $replacements['MilesInc'],
'[ExtraDoc]' => $replacements['ExtraDoc'],
]);
?>
This code is kinda verbose and requires writing repetitive strings. Once you understand the way it works, you can use some loops or array functions to refactor it. For example, you could use the following more compact version ...
<?php
// Reference fields.
$fields = ['MyLocation', 'CustLocation', 'MilesInc', 'ExtraDoc'];
// Creating the replacement pairs.
$replacementPairs = [];
foreach($fields as $field){
$replacementPairs["[{$field}]"] = $replacements[$field];
}
// Perform the replacements.
$PageText = strtr($PageText, $replacementPairs);
?>