How does PHP handle the conversion of a variable into a function using round brackets?

When PHP encounters round brackets after a variable, it interprets it as a function call. To avoid this issue and prevent PHP from trying to convert a variable into a function, you can use curly braces to explicitly define the variable name. 

// Incorrect way of handling variable conversion into a function
$variable = 'hello';
$result = $variable(); // This will cause an error

// Correct way of handling variable conversion into a function
$variable = 'hello';
$result = ${'variable'}(); // Using curly braces to explicitly define the variable name

Keywords

PHP variable function round brackets conversion

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