PHP从字符串中删除预定义的字符

Question

I have a script connecting to a mikrotik router and reading traffic stats from it.

Here is my code:

$y = 0;
foreach ($ARRAYD as $d) {  
    $nodename=$ARRAYD[$y]['target'];  
    //$nodename=trim($nodename);  
    $nodename=substr($nodename,7,-1);//    
    //$nodename=rtrim($nodename, "-1");  

    $traff_bytes=$ARRAYD[$y]['bytes'];  
    $byte_values = preg_split('/\//',$traff_bytes);  

    if ($debug==0) {    
        $fr = fopen($myfile.$nodename,"w");  
        fwrite($fr,$nodename." ");  
        fwrite($fr,time()." ");  
        fwrite($fr,$byte_values[0]." ");  
        fwrite($fr,$byte_values[1]."");  
        fclose($fr);  
        $y++;  
   }  
}

The API response gives me output like <pppoe-0404> as $nodename
then this bit strips it down $nodename=substr($nodename,7,-1); to 0404 by stripping the first 7 and last 1 characters.

The problem occurs if there has been a cpe restart and $nodename becomes 0404-1. How do I strip -1 from the end if it appears?

I tried $nodename=rtrim($nodename, "-1"); but then all nodes ending with 1 would loose the last digit from name. 0401 would become 040 which is incorrect output.

Answer 1

There might be many other things to take into consideration, but to answer yor question, you could do something like this:

first check if there was a restart, then:

$nodename =  explode("-", $nodename);
$nodename = $nodename[0];