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Online Sandbox for SQL and PHP: Write, Run, Test, and Share SQL Queries and PHP Code
<?php
$sentence = '#budget 520 #src Google #aff Test';
$pattern = '/#(\w+)\s(.*?)(?=\s#|$)/';
preg_match_all($pattern, $sentence, $matches);
$tagInfo = array_combine($matches[1], $matches[2]);
$tagInfo = array_map('trim', $tagInfo);
print_r($tagInfo);