Find a specific word in an object using strpos in php - php

Question

I'm trying to set up a test question that will find certain words in a short answer. The words, which will mark the answer as correct, will be stored as values in an object. I was trying to figure out how to do it with strpos(), but every alternative that I come up with gives me a blank screen.
PHP:
$myJSON = file_get_contents('quiz.json');
$json = json_decode($myJSON);
foreach($json as $value) {
foreach($value->answer as $index => $options) {
$findme = "application";
$pos = strpos($options, $findme);
if ($pos === true) {
echo $options;
//echo $value->text->type->answer;
//echo ($index. ' '. $options . '<br>');
//echo current($value);
}
}
}
JSON:
{
"question1": {
"text": "What are the two types of permission lists that DSA concentrates on?",
"type": "short_answer",
"answer": {
"1": "application",
"2": "row-level"
}
},
"question2": {
"text": "What are the building blocks for EmpowHR Security?",
"type": "short_answer",
"answer": {
"1": "permission lists"
}
},
"question3": {
"text": "Who is the bomb?",
"type": "short_answer",
"answer": {
"1": "permission"
}
}
}

Answer 1

Tested the following using your given JSON file.
Important: First I added the , true to $json = json_decode($myJSON); --> $json = json_decode($myJSON, true); This turns the obj into an array
After var_dumping the json encoded I noticed you had mixed string and array types in the level you were trying to parse, so used in_array() to filter out the strings and only iterate through the arrays and was able to locate all instances of the "answers" section in its current build within that obj.
$stmt = NULL;
$find = "application";
$myJSON = file_get_contents('quiz.json');
$json = json_decode($myJSON, true);
foreach( $json as $content ){
foreach( $content as $target){
if(is_array($target)){
// we must find the key of the value within the next level of the array
// and use it as index for the value $target to use in strpos() --> $target[$index]
foreach($target as $index => $value){
if(strpos($target[$index], $find) !== false){
$stmt = '<span>'.$target[$index].': CORRECT</span>';
}
}
}
}
}
echo $stmt;

Answer 2

foreach( $json as $question=>$content ){
foreach( $content as $key=>$value ){
if( strpos( $value, 'applikation' ) !== false
echo $value;
}
}
}
strpos returns the found position and false if not found.
returnvalue === true: allways false
returnvalue == true: false if not found or found on first position (0), true if found after first position (all numbers != 0 are true)
returnvalue !== false: correct result