php - Extract json from mixed content string -

i have string of mixed content, like:

{json stuff} other content same output has < html > tags < div >some< / div > , more stuff, @ end has {json stuff}

so need able use 3 elements:
first json this:

$first_json = json_decode(substr($mixed_string,0, strpos($mixed_string,"}")+1 )); // me first json content // need second json @ end of string,  // length of string unknown , json length unknown // after do: echo preg_replace("/\{[^)]+\}/","",$mixed_string); // , html string... 

so, how can last json?

you can use regex grab json values, , it'll let grab json out of string, no matter length. let's have div id of content, , div has json want extract:

edit: added extraction process function.

function extractjson(content) {    var regex = /({.*?})/g,      raw = content.match(regex),      output = [],      errors = [];      raw.foreach(function(el) {      try {        output.push(json.parse(el));      } catch (e) {        errors.push('issue object: ' + el);      }    });      return {      results: output,      errors: errors    }  }    // grab elements contain json  var elements = document.getelementbyid('content').innerhtml;    console.log(extractjson(elements));