What are some best practices for searching for a substring within a string in PHP, especially in terms of performance and efficiency?

When searching for a substring within a string in PHP, it's important to consider performance and efficiency. One common and efficient way to search for a substring within a string is by using the strpos() function in PHP. This function returns the position of the first occurrence of a substring within a string, or false if the substring is not found. 

// Example of searching for a substring within a string using strpos()
$string = "Hello World";
$substring = "World";

if(strpos($string, $substring) !== false) {
    echo "Substring found!";
} else {
    echo "Substring not found!";
}

Keywords

PHP substring string search performance efficiency

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