How can PHP variables be effectively handled and manipulated in a script?

PHP variables can be effectively handled and manipulated in a script by using various built-in functions such as isset(), unset(), and var_dump(). These functions help in checking if a variable is set, unsetting a variable, and debugging variable values respectively. Additionally, variables can be manipulated using assignment operators like +=, -=, *=, and /= to perform arithmetic operations. 

// Example of handling and manipulating PHP variables
$variable = 10;

// Check if variable is set
if(isset($variable)) {
    echo "Variable is set. <br>";
}

// Unset the variable
unset($variable);

// Check if variable is set after unset
if(!isset($variable)) {
    echo "Variable is unset. <br>";
}

// Manipulate variable using assignment operator
$variable = 5;
$variable += 2;

echo "Variable value after manipulation: " . $variable;

Keywords

PHP variables manipulation handling functions error types

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