json string PHP stristr function case-insensitive string search

Returns the remainder of the string (from the matching point) if the lookup is successful, or false if the string is not found.
Version support: PHP 3+
Syntax:
stristr(string,find)
Description:
string required. Specifies the string to be searched for.
find required. Specifies the characters to search for. If the argument is a number, searches for characters that match the ASCII value for that number.
Tip:
This function is binary safe.
This function is not case sensitive. For case-sensitive searches, use strstr().
Example:
Example 1

Copy the code The code is as follows:

echo stristr("Hello world!","WORLD");
?>

Output:
world !
Example 2

Copy the code The code is as follows:

echo stristr("Hello world!",111);
?>

Output:
o world!

The above introduces the case-insensitive string search of json string PHP stristr function, including the content of json string. I hope it will be helpful to friends who are interested in PHP tutorials.