I wonder if the XML PI spec says anything about <?= Can you have a PI start ... | Hacker News

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		mgkimsal on June 10, 2011 \| parent \| context \| favorite \| on: PHP Hacking aka trying to push PHP internals forwa... I wonder if the XML PI spec says anything about <?= Can you have a PI start with = ? If not, the echo short tag should stay for certain.

zeen on June 10, 2011 [–]

'<?=' is invalid XML. '<?' must be followed by a valid XML Name.

See http://www.w3.org/TR/2008/REC-xml-20081126/#sec-pi

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