php-regexHow to use regex in PHP to do a case insensitive search?

To do a case insensitive search using regex in PHP, you can use the i modifier. This modifier will make the regex pattern case insensitive.

Example code

$string = 'Hello World';
$pattern = '/hello/i';

if (preg_match($pattern, $string)) {
    echo 'Match found';
}

Output example

Match found

Code explanation

• $string: This is the string that we are searching in.
• $pattern: This is the regex pattern that we are using to search. The i modifier makes it case insensitive.
• preg_match(): This is the function used to search for a pattern in a string.

Helpful links

• PHP preg_match() Function
• Regular Expression Modifiers

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