Both functions are used to return or finds the first occurence of a substring from a string, and give all string from first occurence to end of string except than stristr() is case-insensitive.
If no match is found then FALSE will be returned.
Example
$email = 'abc@xyz.com'; $host = strstr($email, '@'); echo $host; output: @xyz.com |
stristr() does the same thing in Case-insensitive manner
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