isset() is returning only true
24725
isset() function is returning true even when item is not set
156604
Why does "true" == true show false in JavaScript?
39947
Checking if a string contains an integer
36929
Why does comparing strings using either '==' or 'is' sometimes produce a different result?
145656
Weak typing in PHP: why use isset at all?
39781
Why does the is operator return false when given null?
30554
is_int and GET or POST
59229
How do I check whether a value in a string is an IP address
134025
How to check if an array value exists?
3800
How do I check to see if a value is an integer in MySQL?
49486
Problem with $_POST, if isset() and mysql_fetch_assoc(): echo returns correct value, page source always returns else value
75153
How to check value is coming from json is null or not?
29277
INET_ATON() and INET_NTOA() in PHP?
105722
boolean properties starting with "is" does not work
137092
PHP: mysql_connect not returning FALSE
43338
count of false gives 1 and if of an empty array gives false. why?
34563
Why does PHP consider 0 to be equal to a string?