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Undefined offset: 1

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YellowSnowman85 answered on June 6, 2020 Popularity 10/10 Helpfulness 3/10

answer Undefined offset: 1

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Undefined offset: 1

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if ( ! isset($parts[1])) {
   $parts[1] = null;
}

$data[$parts[0]] = $parts[1];

Popularity 10/10 Helpfulness 3/10 Language whatever

Source: stackoverflow.com

Tags: undefined whatever

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Contributed on Jun 15 2022

YellowSnowman85

0 Answers Avg Quality 2/10

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If preg_match did not find a match, $matches is an empty array. So you should check if preg_match found an match before accessing $matches[0], for example:

function get_match($regex,$content)
{
    if (preg_match($regex,$content,$matches)) {
        return $matches[0];
    } else {
        return null;
    }
}

Popularity 10/10 Helpfulness 2/10 Language php

Source: stackoverflow.com

Tags: offset of

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Contributed on Jun 06 2020

Ankur

0 Answers Avg Quality 2/10

undefined offset 0

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<?php 
include("config.php"); 

function getAllVotes($id) 
{ 
    $votes = array(); 
    $q = "SELECT * FROM entries WHERE id = $id"; 
    $r = mysql_query($q); 
    if(mysql_num_rows($r)==1)//id found in the table 
    { 
        $row = mysql_fetch_assoc($r); 
        $votes[0] = $row['votes_up']; 
        $votes[1] = $row['votes_down']; 
    } 
    return $votes; 
} 

function getEffectiveVotes($id) 
{ 
        $votes = getAllVotes($id); 
        $effectiveVote = $votes[0] - $votes[1];    //ERROR THROWN HERE
        return $effectiveVote; 
} 

$id = $_POST['id']; 
$action = $_POST['action']; 

//get the current votes 
$cur_votes = getAllVotes($id); 

//ok, now update the votes 

if($action=='vote_up') //voting up 
{ 

    $votes_up = $cur_votes[0]+1;     //AND ERROR THROWN HERE


    $q = "UPDATE threads SET votes_up = $votes_up WHERE id = $id"; 
} 
elseif($action=='vote_down')
{ 
    $votes_down = $cur_votes[1]+1; 
    $q = "UPDATE threads SET votes_down = $votes_down WHERE id = $id"; 
} 

$r = mysql_query($q); 
if($r)
{ 
    $effectiveVote = getEffectiveVotes($id); 
    echo $effectiveVote." votes"; 
} 
elseif(!$r) //voting failed 
{ 
    echo "Failed!"; 
} 
?>

Popularity 10/10 Helpfulness 1/10 Language php

Source: stackoverflow.com

Tags: offset of

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Contributed on Dec 26 2021

Bewildered Butterfly

0 Answers Avg Quality 2/10

Undefined offset: 1

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