How to fix: Warning: stristr(): Empty needle in c:

[Chuks]

I was trying to use Ajax to  to communicate with the server while a user types characters in the input field.

After creating the HTML code, and the PHP file, on testing it I got the error message: "Warning: stristr(): empty needle in C:\wamp\www\php\revision\ajax\gethint.phponline 50". 

I don't understand or know how to get around the error.

Please help

( ! ) Warning: stristr(): Empty needle in C:\wamp\www\php\revision\ajax\gethint.php on line 50
Call Stack
#	Time	Memory	Function	Location
1	0.0002	385600	{main}( )	...\gethint.php:0
2	0.0002	386544	stristr ( )	...\gethint.php:50

 

 

ajax and php.php gethint.php

[dsonesuk]

You have to provide the string to search through (haystack) AND the string to search for (needle), its telling you you only have the first. So you are looking through the haystack not knowing what the needle looks like.

[Chuks]

Thanks, but I don't know how to provide it. I am only working with the w3schools.com tutorial on PHP  - Ajax and PHP. If you. You would notice the file "gethint.php" is as in the tutorial.

[dsonesuk]

I can't access it, so if you provide relevant code we might be able to help.

[justsomeguy]

The manual shows how to use the function:

https://www.php.net/manual/en/function.stristr.php