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This example assumes that a prior value was known and that we are offering a user the chance to edit that prior value.If no prior value was actually known, no default value will be set.Needless to say, if PHP picked up any more ternary operators, this will be a problem."Conditional Operator" is actually descriptive of the semantics, and is the name historically given to it in, e.g., C.For converted Perl programmers: use strict comparison operators (===, !
This is important to know if you want to return a variable by reference. its easy to fall into the trap of:if ($_GET['myvar']==0) dosomething();as this will dosomething() even when $_GET['myvar'] is 'some string' and clearly not the value 0i was getting lazy with my types since php vars are so flexible, so be warned to pay attention to the details...Since 'X' or any other string without a number in it converts to 0 when compared to a number, 0 == 0 && 'X' == true && 0 == false In the table "Comparison with Various Types", please move the last line about "Object" to be above the line about "Array", since Object is considered to be greater than Array (tested on 5.3.3)(Please remove my "Anonymous" post of the same content before.You could check IP to see that I forgot to type my name)# May work with warnings that $tally[$index] is not initialized # Notice: Undefined offset: 1 in D:\htdocs\colors\Color Compare\on line #__ # It is an old fashioned way.I would add some more to it: The workaround is to use strcmp() or ===.Note on ===: While the php documentation says that, basically,($a===$b) is the same as ($a==$b && gettype($a) == gettype($b)),this is not true.