自己的助手codeigniter中的未定义偏移量[关闭]

Question

I want to concatenate characters "/\b" in front of array value $stopwords, and concatenate characters "\b/i" in the back.

My helper

function addRegex_SW($arrayIn = array()){
    $arrayOut = array();
    $count = count($arrayIn);   
    for ($i = 1; $i <= $count; $i++)
    {
       $char1 = "/\b"; 
       $char2 = "\b/i";
       $arrayOut[$i] = $char1.$arrayIn[$i].$char2;
       //echo $arrayOut[$i];
    }
return $arrayOut;
}

My view

$stopwords_Regex = addRegex_SW($stopwords);

Then when I run the code

A PHP Error was encountered
Severity: Notice
Message: Undefined offset: 317
Filename: helpers/addRegex_helper.php
Line Number: 11

Which line is

$arrayOut[$i] = $char1.$arrayIn[$i].$char2;

I'm sure I had google it, but I dont still get it. Thanks

Answer 1

Your for-loop is off-by-one

Change: for ($i = 1; $i <= $count; $i++)

To: for ($i = 0; $i < $count; $i++)