PHP4 introduced Booleans for the very first time. Booleans did’t existed before PHP4. Booleans are the values that may be true or false. Here both are case-insensitive. Given example assigns value TRUE to $xyz :
PHP: DATA TYPES There are 8 data types in PHP out of which 5 are scalar. Variables hold the values of these data types. Variables react according to...
PHP: Data Types: Resources Resource are special data types. They represent PHP extension resources like database query, database connection etc. These variables types are passed around relevant functions which...
PHP: Data Types: Strings Strings are internally null-terminated sequence of characters. A string can be used directly in a function call or it can be stored in a variable....
PHP: Data Types: Null Null data type can have only one possible value that is NULL. Here the variable represents with no value which means the variable is marked...
PHP: Data Types: Strings: Single Quotes Single quote (”) is used to specify a string. Example: <?php echo ‘string is specified in single quote’ ?> (Related Tutorials) ...
PHP: Data Types: Arrays Array is the collection of indexes (key) that are mapped to values, it is a place to store a set of values. Indexes can be...
PHP: Data Types: Integers Integers are whole numbers. An integer is a number of the set Z = {…, -2, -1, 0, 1, 2, …}. Integers are written in...
PHP: Data Types: Constants Instead of using assignment operators like we do while declaring variables, constants are defined by define() function. Constants don’t use any $ sign like variables...
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[...] PHP: Data Types: Booleans [...]