Parse json with PHP. Getting Undefined property: stdClass errors

Question

I am having some issues parsing a json file from Jenkins using PHP

    {
  "actions" : [
    {
      "causes" : [
        {
          "shortDescription" : "Started by an SCM change"
        }
      ]
    },
    {

    },
    {

    },
    {
      "buildsByBranchName" : {
        "origin/release_5.6.0" : {
          "buildNumber" : 242,
          "buildResult" : null,
          "marked" : {
            "SHA1" : "fde4cfd86b8511d328037b9e9c55876007bb6e67",
            "branch" : [
              {
                "SHA1" : "fde4cfd86b8511d328037b9e9c55876007bb6e67",
                "name" : "origin/release_5.6.0"
              }
            ]
          },
          "revision" : {
            "SHA1" : "fde4cfd86b8511d328037b9e9c55876007bb6e67",
            "branch" : [
              {
                "SHA1" : "fde4cfd86b8511d328037b9e9c55876007bb6e67",
                "name" : "origin/release_5.6.0"
              }
            ]
          }
        },
        "origin/release_5.7.0" : {
          "buildNumber" : 315,
          "buildResult" : null,
          "marked" : {
            "SHA1" : "ae2cbf69a25e0632e0f1d3eeb27a907b154efce0",
            "branch" : [
              {
                "SHA1" : "ae2cbf69a25e0632e0f1d3eeb27a907b154efce0",
                "name" : "origin/release_5.7.0"
              }
            ]
          },
          "revision" : {
            "SHA1" : "ae2cbf69a25e0632e0f1d3eeb27a907b154efce0",
            "branch" : [
              {
                "SHA1" : "ae2cbf69a25e0632e0f1d3eeb27a907b154efce0",
                "name" : "origin/release_5.7.0"
              }
            ]
          }
        },

I have tried doing the following

//Read in JSON object
$json_file2 = file_get_contents('url.com/json');
//Decode JSON file
$test = json_decode($json_file2); //object
//print_r($json_file2);

echo $test->causes;

I am also trying to access the different sections in "buildsByBranchName". I have tried many different variations of the code above, but I keep getting "Undefined property: stdClass" errors.

John Conde · Accepted Answer · 2015-10-18 03:08:03Z

3

You are not accessing that value properly. causes resides under actions which is an array. Your code also won't work because causes is an array.

// This is an array so you can't use echo here.
$causes = $test->actions[0]->causes; 

// echo out the shortDescription
echo $causes[0]->shortDescription;

or

echo $test->actions[0]->causes[0]->shortDescription;

edited Oct 18, 2015 at 3:08

answered Oct 18, 2015 at 3:02

John Conde

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6 Comments

teej2542 Over a year ago

I just seen what you added, the last line of code works. Also what about accessing the "buildsByBranchName" section?

teej2542 Over a year ago

I tried the following, but no luck. $version = "origin/release_5.6.0"; echo $test->actions[0]->causes[0]->buildsByBranchName[0]->$version->buildNumber;

John Conde Over a year ago

buildsByBranchName is not under causes

teej2542 Over a year ago

Still getting an error (Undefined property: stdClass::$buildsByBranchName). Using the following below. $version = "origin/release_5.6.0"; echo $test->actions[0]->buildsByBranchName->$version->buildNumber;

teej2542 Over a year ago

I think I am having an issue because of the empty brackets in the Json above buildsByBranchName.

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