note 125192 added to function.is-string

is_string() of an integer or float returns false, so it might be useful to include an is_numeric() when checking if a value is stringy: <?php function is_stringy($val) { return (is_string($val) || is_numeric($val) || (is_object($val) && method_exists($val, '__toString'))); } ?> Test code (which should print "vector N OK" for each test vector): <?php foreach ([[NULL, false], [false, false], [true, false], [0, true], [[], false], [0.1, true], ["x", true], ["", true], [new Exception("x"), true]] as $idx => $vector) { list ($val, $expected) = $vector; if (is_stringy($val) != $expected) { print ("mismatch at $idx\n"); var_dump($val); } else { print ("vector $idx OK\n"); } } ?> ---- Server IP: 45.112.84.4 Probable Submitter: 103.51.167.36 (proxied: 75.80.44.201) ---- Manual Page -- http://php.net/manual/en/function.is-string.php Edit -- https://master.php.net/note/edit/125192 Del: integrated -- https://master.php.net/note/delete/125192/integrated Del: useless -- https://master.php.net/note/delete/125192/useless Del: bad code -- https://master.php.net/note/delete/125192/bad+code Del: spam -- https://master.php.net/note/delete/125192/spam Del: non-english -- https://master.php.net/note/delete/125192/non-english Del: in docs -- https://master.php.net/note/delete/125192/in+docs Del: other reasons-- https://master.php.net/note/delete/125192 Reject -- https://master.php.net/note/reject/125192 Search -- https://master.php.net/manage/user-notes.php