json to csv for Point objects and properties

jsontocsv-point.php

#!/usr/bin/php
<?php
/*
* Convert JSON file to CSV and output it.
*
* JSON should be an array of objects, dictionaries with simple data structure
* and the same keys in each object.
* The order of keys it took from the first element.
*
* Example:
* json:
* [
*  { "key1": "value", "kye2": "value", "key3": "value" },
*  { "key1": "value", "kye2": "value", "key3": "value" },
*  { "key1": "value", "kye2": "value", "key3": "value" }
* ]
*
* The csv output: (keys will be used for first row):
* 1. key1, key2, key3
* 2. value, value, value
* 3. value, value, value
* 4. value, value, value
*
* Uses:
* json-to-csv.php file.json > file.csv
*/
if (empty($argv[1])) die("The json file name or URL is missed\n");
$jsonFilename = $argv[1];
$json = file_get_contents($jsonFilename);
$array = json_decode($json, true);
$f = fopen('php://output', 'w');
$firstLineKeys = false;
createLines($array,$f);


function strpos_array($haystack, $needles, $offset = 0) {
	if (is_array($needles)) {
		foreach ($needles as $needle) {
			$pos = strpos_array($haystack, $needle);
			if ($pos !== false) {
				return $pos;
			}
		}
		return false;
	} else {
		return strpos($haystack, $needles, $offset);
	}
}

function createLines(array $lines, $f){
	if (empty($firstLineKeys))
	{
		$firstLineKeys = array_keys($lines[0]);
		//create keys for firstline//
		foreach($firstLineKeys as $key) {
			if($key == "geometry") {
				$point = $lines[0][$key];
				if($point["type"] == "Point"){
					array_shift($firstLineKeys);
					array_unshift($firstLineKeys,"lat");
					array_unshift($firstLineKeys,"lon");
					array_pop($firstLineKeys);
					array_splice($firstLineKeys, 2);
				}
			}
			if($key == "properties") {
				$props = $lines[0][$key];
				$keys = array_keys($props);

				foreach($keys as $prop){
					array_push($firstLineKeys,$prop);
				}
			}


		}
		fputcsv($f, $firstLineKeys);

	}

	$val = [];
	foreach($lines as $row){
		$point = $row["geometry"]["coordinates"];
		$lat = $point[1];
		$lon = $point[0];
		array_push($val,$lon);
		array_push($val,$lat);

		$props = $row["properties"];
		foreach($props as $prop){
			if(gettype($prop) !== "array"){
				array_push($val,$prop);

			}
		}
		fputcsv($f,$val);
		$val =[];
	}
		
	
	
	// // Using array_merge is important to maintain the order of keys acording to the first element

	

	
	
 }

?>