How can escape characters and single quotes be used effectively in PHP code to prevent variable name replacement?

To prevent variable name replacement in PHP code, you can use escape characters like backslashes (\) before the dollar sign ($) or wrap the variable name in single quotes (''). This will ensure that the variable name is treated as a literal string and not replaced with its value. Example PHP code snippet: 

$var = 'test';
echo "\$var"; // Output: $var
echo '$var'; // Output: $var

Keywords

escape characters single quotes variable name replacement PHP code prevent

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