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<?php $d = new DOMDocument(); $xs = '<?xml version="1.0" ?><root><foo /></root>'; $d->loadXML($xs); $x = new DOMXPath($d); // simple eval var_dump($x->evaluate('false()')); // complex but valid eval var_dump($x->evaluate('count(//foo)=0')); // bad eval var_dump($x->evaluate(')')); print_r(error_get_last());
Output for git.master, git.master_jit, rfc.property-hooks
bool(false) bool(false) Warning: DOMXPath::evaluate(): Invalid expression in /in/fgMTl on line 15 Warning: DOMXPath::evaluate(): Invalid expression in /in/fgMTl on line 15 bool(false) Array ( [type] => 2 [message] => DOMXPath::evaluate(): Invalid expression [file] => /in/fgMTl [line] => 15 )

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