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However, it should be noted that the dot (period, full stop) is not a valid character in a PHP variable name. For the reason, look at it: If a variable in a function has the same name as one outside the function, the one inside the function is still considered a different variable. When you leave the function and use the variable name again, it is the same as before you entered the function. You can read a better explanation of variable scope in PHP's manual. Chapter 2: Variables Section 2.1: Accessing A Variable Dynamically By Name (Variable variables) Variables can be accessed via dynamic variable names.
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You can read a better explanation of variable scope in PHP's manual. Chapter 2: Variables Section 2.1: Accessing A Variable Dynamically By Name (Variable variables) Variables can be accessed via dynamic variable names. The name of a variable can be stored in another variable, allowing it to be accessed dynamically.
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also discussed variable scope, static variable and reserved words. Basics. Variables in PHP are represented by a dollar sign followed by the name of the variable. The variable name is case-sensitive.
Variable names follow the same rules as other labels in PHP. A valid variable name starts with a letter or underscore, followed by any number of letters, numbers, or underscores.
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PHP variables are used for storing values such as numeric values, character strings, or memory addresses so that they can be used in any part of the program.
Variables in PHP are represented by a dollar sign followed by the name of the variable.
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Honor Code. The scope of a variable is the part of the script where the variable can be referenced/used.
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– piersb Sep 25 '15 at 14:33 1 @Piersv maybe because dereferencing a variable property that is an array has different semantics between PHP 5 and PHP 7, and the fact that this can always be circumvented by using an array. Sometimes we have to add a variable that represents another part of a query, such as a keyword or an identifier (a database, table or a field name).