php - Parsing a Multi Dimensional JSON string from URL

Question

I'm trying to access some values in JSON that are returned form this URL: https://api.crypto-bridge.org/api/v1/ticker

Basically, I want to be able to get last, volume, ask & bid for "id":"FROST_BTC" (for example)

For now, I simply want to echo those out onto a php page.

Like:

Volume = 0.13
Ask = 0.033
Bid = 0.035
Last = 0.034

Due to the amount of data on the page, I'm not sure at all how to go about this ? Any thoughts, examples or readings so I can figure this one out ?

PHP would be preference, but open to try/learn anything.

标签： phpjsonparsingcurl

Answer 1

Simply try like this with php curl

<?php
$curl = curl_init();
curl_setopt_array($curl, array(
    CURLOPT_URL => "https://api.crypto-bridge.org/api/v1/ticker",
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_ENCODING => "",
    CURLOPT_MAXREDIRS => 10,
    CURLOPT_TIMEOUT => 30,
    CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
    CURLOPT_CUSTOMREQUEST => "GET",
));
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
    echo "cURL Error #:" . $err;
} else {
    $response_array = json_decode($response,1);
}
/*
# JUST FOR DEBUGGING PURPOSE
print '<pre>';
print_r($response_array);
print '</pre>';
*/
foreach($response_array as $k=>$v){
    echo "id = {$v['id']}, last = {$v['last']}, volume = {$v['volume']}, ask = {$v['ask']}, bid = {$v['bid']}";
    echo PHP_EOL;  
}
?> 

EDIT: As per comment

Way 1: use break; after printing 1st row

foreach($response_array as $k=>$v){
    echo "id = {$v['id']}, last = {$v['last']}, volume = {$v['volume']}, ask = {$v['ask']}, bid = {$v['bid']}";
    echo PHP_EOL;  
    break;
}

Way 2 grab first row and then use loop to print it

$first_row = $response_array[0];
foreach($first_row as $k=>$v){
    echo "$k = $v";
}

Way 3 using array_filter() for specific row printing

$vacek_required = array_filter($response_array, function ($var) {
    return ($var['id'] == 'WGR_BTC');
});

foreach($vacek_required as $k=>$v){
    echo "$k = $v";
}