Friday, July 24, 2020

PHP: Resource variables

Resource variables hold special handles to opened files, database connections, streams, image canvas areas and
the like (as it is stated in the manual) .

$fp = fopen( 'file.ext', 'r' ); // fopen() is the function to open a file on disk as a resource.
var_dump($fp) ; // output: resource(2) of type (stream)


To get the type of a variable as a string, use the gettype( ) function:

echo gettype(l); // outputs "integer"
echo gettype(true) ; // "boolean"



Source: PHP Notes for Professionals by Goal Kicker - Internet Archive Data
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