php is string



months ago. as noted earlier, is_string() returns false on an object that has a __tostring() method. here is a simple way to do a check that will work: <?php determine if the passed argument can be treated like a string. function is_stringy($text) { return (is_string($text) || (is_object($text) && method_exists($text, '__tostring' )); the is_string () function is used to find whether a variable is a string or not. the is_string php function is used to check if a value is a string. it returns true or false. a string contains text and numbers treated as text.

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here is a simple little benchmarking script you can modify to see what works best. i just tried a few variations of the same thing, the first one is the fastest by a small margin, but they are basically all the same. and there isn't really a simpler way for you to write it. also $val === '' is slightly faster than  unlike for example c, php has an inbuilt string datatype. the string datatype allows you arraylike access to the single characters in the string but will always be a string . so if you pass it to a function that accepts the mixed datatype this function will determine the datatype of the passed argument and treat it  déc. if(empty($stringvar)) { do something }. you could also add trim() to eliminate whitespace if that is to be considered. edit: note that for a string like ' ', this will return true, while strlen() will not.

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ok, edited, with incorporating michiel pater's suggestion (who's answer is gone now) ans eisberg's suggestions. settype will return true with objects no matter what, as it seems. if( ( !is_array( $item ) ) && ( ( !is_object( $item ) && settype( $item, 'string' ) !== false ) || ( is_object( $item ) && method_exists(  if that's your whole string, then just try parsing it: if (datetime::createfromformat('ymd g:i:s', $mystring) !== false) { it's a date }. déc. function for basic field validation (present and neither empty nor only white space function isnulloremptystring($question){ return (!isset($question) || trim($question)===''); }. parameter, description. search, required. specifies the what to search for. array, required. specifies the array to search. type, optional. if this parameter is set to true, the in_array() function searches for the searchstring and specific type in the array.

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