What are the potential drawbacks of using substr and strpos functions for string replacement in PHP?

Using substr and strpos functions for string replacement in PHP can be error-prone and inefficient, especially when dealing with complex string manipulations. It can lead to unexpected results if not handled carefully, such as replacing the wrong occurrence of a substring or missing some instances altogether. A better approach would be to use built-in functions like str_replace or preg_replace, which provide more robust and reliable string replacement functionality. 

// Example of using str_replace for string replacement
$string = "Hello, World!";
$replacement = "Universe";
$newString = str_replace("World", $replacement, $string);
echo $newString;

Keywords

substr strpos string replacement drawbacks PHP

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