What are the advantages and disadvantages of using global variables in PHP for data manipulation and display?

Using global variables in PHP for data manipulation and display can make it easier to access and modify data across different parts of your code. However, it can also lead to potential issues such as variable name conflicts, code readability problems, and difficulties in debugging. It is generally recommended to limit the use of global variables and instead consider alternative solutions such as passing variables as function parameters or using classes and objects for data management. 

// Example of using global variables for data manipulation and display
$globalVar = "Hello, world!";

function displayGlobalVar() {
    global $globalVar;
    echo $globalVar;
}

displayGlobalVar();

Keywords

global variables data manipulation display advantages disadvantages

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