just as note: if you want to check variables by boolean value: true or false , "isset" has a different meaning!<?php$var=null;// sample 1if($var) { // if true or another value exept "false" , "null": go on here echo "1. var is true or has a value $var";} else { ech...
just as note: if you want to check variables by boolean value: true or false , "isset" has a different meaning!<?php$var=null;// sample 1if($var) { // if true or another value exept "false" , "null": go on here echo "1. var is true or has a value $var";} else { ech...
We use the isset() function within aconditional if statement, passing in the “$x” variable into the parameter. Since we just declared this variable, we knowPHP will echothe text"$x is set". Our second conditional statement uses PHP’sisset()function again. However, we are passing in a...
just as note: if you want to check variables by boolean value: true or false , "isset" has a different meaning!<?php$var=null;// sample 1if($var) { // if true or another value exept "false" , "null": go on here echo "1. var is true or has a value $var";} else { ech...
A variable is NULL if it has no value, and points to nowhere in memory. empty() is more a literal meaning of empty, e.g. the string “” is empty, but is not NULL. If a form field is left blank it will return “” i.e. is empty string. ...
This call will block # meaning the code will come to a halt here until a consumer # is available. fifo_file.write(self.frame.tobytes()) except IOError: continue def set_frame_data(self, frame): """ Method updates the image data. This currently encodes the numpy array to jpg but ...
Meaning, after this, instad of doing: if(isset($_GET['something']) && !empty($_GET['something'])) $var = $_GET['something']; echo $var; Just do: echo $check['something'] Share Improve this answer Follow edited Sep 26, 2013 at 9:29 answered Sep 26, 2013 at 9:11 ...