Code to replace the output of the section PHP

That part of the loop keeps writing wrong.

Requirements are as follows
Read A.txt content is
111,2222
333,4444
555,7777
Such a format

If the value of $goods_id is equal to the value in front of one of the rows, then the output is converted to a later output, such as $goods _id=111, then the replacement outputs $goods_id=2222

Reply content:

That part of the loop keeps writing wrong.

Requirements are as follows
Read A.txt content is
111,2222
333,4444
555,7777
Such a format

If the value of $goods_id is equal to the value in front of one of the rows, then the output is converted to a later output, such as $goods _id=111, then the replacement outputs $goods_id=2222

$goods_id = 111;$handle = fopen("f:/test.txt", "r");while (!feof($handle)) {    $line = fgets($handle, 4096);    //echo $line."
";    $str = explode(",",$line);    if($str[0] == $goods_id ){        echo $str[1];    }}    fclose($handle);

`

function getGoodsIpMap(){    $fh = fopen('a.txt', 'r');    $goodsMap = array();    while($line=fgets($fh)!==false)    {        if(empty($line))        {            continue;        }        list($oldId, $newId) = explode(',',trim($line));        $goodsMap[$oldId] = $newId;    }    fclose($fh);}$goodsIdMap = getGoodsIpMap();$newId = isset($goodsIdMap[$goodsId]) ? $goodsIdMap[$goodsId] : $goodsId;

`

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