Codeigniter "SPACE" when input caused error

Question

Problem: When User enter "Space" in register form , it will still entered into database , how do i prevent it ?

Code I tried: Used trim , but same problem occurred when users only Enter "SPACE", how do i resolve the issue ?

$userName=  ($this->input->post("userName"))? trim($this->input->post("userName"), " ") : "NIL";

`$userName= (trim($this->input->post("userName"), " ") !="")? trim($this->input->post("userName"), " ") : "NIL";` try this — Regolith, Jul 11 '19 at 04:50
I think use need to do one more check like is not null or not empty with user input. — Kuldeep singh, Jul 11 '19 at 06:35

Regolith · Answer 1 · 2019-07-11T05:11:29.260

1

First of all your are assigning value to $username so it will not be null

You can check the value using

$userName= (trim($this->input->post("userName"), " ") !="")? trim($this->input->post("userName"), " ") : "NIL";

but this will assign value either ways, if it is null than $username will be NIL else the input value

Suggestion

 $username = "";
if(trim($this->input->post("userName"), " ") != ""){
    $userName= $this->input->post("userName");
    //insert into database
}else{
//redirect with error message
}

Also, use client side and server side validation and check minimum length to that field

edited Jul 11 '19 at 05:11

answered Jul 11 '19 at 04:56

Regolith

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i did that ,but when user enter "space" it will still enter to database – xaxacodess Jul 11 '19 at 04:59
did you use any validation? – Regolith Jul 11 '19 at 04:59

score 1 · Accepted Answer · answered Jul 11 '19 at 06:22

$userName= ctype_space($this->input->post("userName"))? trim($this->input->post("userName"), " ") : "NIL";
 ----- OR ------
$userName= strlen(trim($this->input->post("userName")))!=0? trim($this->input->post("userName"), " ") : "NIL";

You can use ctype_space to check if the string contains only space . Please refer to this question If string only contains spaces?

Codeigniter "SPACE" when input caused error

2 Answers2