如何在PHP中以适当的json格式转换包含多个json数据的字符串？

How can I convert this string:

{"id":"tag:search.twitter.com,2005:1"}{"id":"tag:search.twitter.com,2005:2"}
{"id":"tag:search.twitter.com,2005:3"}{"id":"tag:search.twitter.com,2005:4"}

Into this JSON format:

[
    {"id":"tag:search.twitter.com,2005:1"},
    {"id":"tag:search.twitter.com,2005:2"},
    {"id":"tag:search.twitter.com,2005:3"},
    {"id":"tag:search.twitter.com,2005:4"}
]

Assuming that your string is composed of valid JSON object put together without any delimiter, you can do the following:

1. Split the string with }{ as delimiter
2. Loop over each item in the resulting array and add the missing parts
3. Merge the array into one string with a , as delimiter
4. Add the JSON array marks before and after the string

Example (with $input as the input string):

$chunks = explode('}{', $input);
$n = count($chunks);
for($i = 0; $i < $n; $i++) {
    if($i == 0) {
        $chunks[$i] = $chunks[$i].'}';
    } else if($i == $n - 1) {
        $chunks[$i] = '{'.$chunks[$i];
    } else {
        $chunks[$i] = '{'.$chunks[$i].'}';
    }
}
$output = '['.implode(',', $chunks).']';

Note that it will work on imbricated structures, but will miserably fail if you have a }{ in the text. But it is unlikely.

EDIT: One simple way of checking if the current chunk is a wrong cut could be by checking is the next chunk start with a ", because JSON object's attributes are always quoted. If not, then you can merge the current and next chunk and repeat until finding the right character.

You can do it like this:

$str = '{"id":"tag:search.twitter.com,2005:1"}{"id":"tag:search.twitter.com,2005:2"}
{"id":"tag:search.twitter.com,2005:3"}{"id":"tag:search.twitter.com,2005:4"}';

// wrap the string in [] to make it an array (when decoded).
// replace all the '}<spaces/line breaks/tabs>{' to '},{' to make it valid JSON array.
// decode the new JSON string to an object.    
$obj = json_decode('[' . preg_replace('/}\s*{/', '},{', $str) . ']');

var_dump($obj);

Output:

array (size=4)
  0 => 
    object(stdClass)[424]
      public 'id' => string 'tag:search.twitter.com,2005:1' (length=29)
  1 => 
    object(stdClass)[517]
      public 'id' => string 'tag:search.twitter.com,2005:2' (length=29)
  2 => 
    object(stdClass)[518]
      public 'id' => string 'tag:search.twitter.com,2005:3' (length=29)
  3 => 
    object(stdClass)[519]
      public 'id' => string 'tag:search.twitter.com,2005:4' (length=29)

Thanks for giving your comments on my question...I have resolved my issue by putting below code

    foreach (preg_split("/((?
)|(
?))/", $tdata) as $line)
    {
    print_r(json_decode($line));      
    }