<?php $hello = 'Hi'; $name = 'ken'; $replacements = [ 'hello' => 'morning', 'invoiceno' => 1234 ]; $msg = '$hello, $name (JX02), Your Orders $invoiceno has been delivered. $test $123,99 $123.99 Thank you.'; $result = preg_replace_callback('/\$([\w\_-]{1,})/', function ($match) use ($replacements) { return array_key_exists($match[1], $replacements) ? $replacements[$match[1]] : ( isset($GLOBALS[$match[1]]) ? $GLOBALS[$match[1]] : '$'.$match[1] ); }, $msg); echo $result;
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