<?php $text="key1=value 1 key2=value 2 key3=val 3"; var_export(array_chunk(preg_split('~=| (?=\w+=)~', $text), 2)); echo "\n---\n"; var_export(array_chunk(preg_split('~ ?(\w+)=~', $text, null, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE), 2));
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