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run code in 500+ PHP versions simultaneously
<?php $xml = new SimpleXmlElement( <<<XML <root/> XML ); $xml->a->b[0] = 'Works'; echo $xml->asXML(); $xml = new SimpleXmlElement( <<<XML <root/> XML ); $xml->a->b->{0} = 'Only works before PHP 7.0'; echo $xml->asXML();
Output for rfc.property-hooks, git.master, git.master_jit
<?xml version="1.0"?> <root><a><b>Works</b></a></root> <?xml version="1.0"?> <root><a><b><0>Only works before PHP 7.0</0></b></a></root>

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