PHP array to json string to send it to javascript using ajax

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http://www.bin-co.com/php/scripts/array2json/

array2json

function array2json($arr) {
    if(function_exists('json_encode')) return json_encode($arr); //Lastest versions of PHP already has this functionality.
    $parts = array();
    $is_list = false;
 
    //Find out if the given array is a numerical array
    $keys = array_keys($arr);
    $max_length = count($arr)-1;
    if(($keys[0] == 0) and ($keys[$max_length] == $max_length)) {//See if the first key is 0 and last key is length - 1
        $is_list = true;
        for($i=0; $i<count($keys); $i++) { //See if each key correspondes to its position
            if($i != $keys[$i]) { //A key fails at position check.
                $is_list = false; //It is an associative array.
                break;
            }
        }
    }
 
    foreach($arr as $key=>$value) {
        if(is_array($value)) { //Custom handling for arrays
            if($is_list) $parts[] = array2json($value); /* :RECURSION: */
            else $parts[] = '"' . $key . '":' . array2json($value); /* :RECURSION: */
        } else {
            $str = '';
            if(!$is_list) $str = '"' . $key . '":';
 
            //Custom handling for multiple data types
            if(is_numeric($value)) $str .= $value; //Numbers
            elseif($value === false) $str .= 'false'; //The booleans
            elseif($value === true) $str .= 'true';
            else $str .= '"' . addslashes($value) . '"'; //All other things
            // :TODO: Is there any more datatype we should be in the lookout for? (Object?)
 
            $parts[] = $str;
        }
    }
    $json = implode(',',$parts);
 
    if($is_list) return '[' . $json . ']';//Return numerical JSON
    return '{' . $json . '}';//Return associative JSON
}

A fixed and modified version of the above

<?php
function array2json(array $arr)
{
if(function_exists('json_encode')) return json_encode($arr); //Lastest versions of PHP already has this functionality.
$parts = array();
$is_list = false;
 
if (count($arr)>0){
//Find out if the given array is a numerical array
$keys = array_keys($arr);
$max_length = count($arr)-1;
if(($keys[0] === 0) and ($keys[$max_length] === $max_length)) {//See if the first key is 0 and last key is length - 1
$is_list = true;
for($i=0; $i<count($keys); $i++) { //See if each key correspondes to its position
if($i !== $keys[$i]) { //A key fails at position check.
$is_list = false; //It is an associative array.
break;
}
}
}
 
foreach($arr as $key=>$value) {
$str = ( !$is_list ? '"' . $key . '":' : '' );
if(is_array($value)) { //Custom handling for arrays
$parts[] = $str . array2json($value);
} else {
//Custom handling for multiple data types
if (is_numeric($value) && !is_string($value)){
$str .= $value; //Numbers
} elseif(is_bool($value)) {
$str .= ( $value ? 'true' : 'false' );
} elseif( $value === null ) {
$str .= 'null';
} else {
$str .= '"' . addslashes($value) . '"'; //All other things
}
$parts[] = $str;
}
}
}
$json = implode(',',$parts);
 
if($is_list) return '[' . $json . ']';//Return numerical JSON
return '{' . $json . '}';//Return associative JSON
}
?>

Unterminated string literal error in javascript when using array2json

Remove the newlintes and tabs.
Thats it. If done then every thing is ok.

Reference

Copied from the following URL. For more information refer the following url.

• http://www.bin-co.com/php/scripts/array2json/