How can PHP be used to perform a case-insensitive search for a word in a string?

To perform a case-insensitive search for a word in a string using PHP, you can use the `stripos()` function. This function finds the position of the first occurrence of a substring in a string, ignoring case. You can use this function to check if a specific word exists in a string without being case-sensitive. 

$string = "Hello World";
$word = "hello";

if(stripos($string, $word) !== false) {
    echo "The word '$word' was found in the string.";
} else {
    echo "The word '$word' was not found in the string.";
}

Keywords

php case-insensitive search string function

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