PHP - Parsing nested JSON array values -


i have hit wall , not sure causing this. parsing json file , creating variables. ones not nested in arrays work great. these 2 below not though , not sure why. $hail var value shows both hail , $wind var , puzzled why.

here snippet of code create variable value. 

     $hail = isset($currfeature['properties']['parameters']['hailsize'][0]);      $wind = isset($currfeature['properties']['parameters']['windgust'][0]);

here how outputted , displayed in html displays shows $hail both var. 

 <div class="alerts-description"> hazards<br /><? if (isset($hail)) {echo $hail . '" hail';} ?><br /> <? if (isset($wind)) {echo $wind . '" mph winds';} ?></div>

example of array both hailsize , windgust nested under parameters , both [0]

                    [response] => avoid                     [parameters] => array                         (                             [hailsize] => array                                 (                                     [0] => 0.50                                 )                              [windgust] => array                                 (                                     [0] => 70                                 )                              [vtec] => array                                 (                                     [0] => /o.new.kfwd.fa.w.0008.170813t1318z-170813t1615z/                                 )                              [eas-org] => array                                 (                                     [0] => wxr                                 )

any suggestions doing wrong or missing?

edit: link example code hit "run it" button"

http://rextester.com/eele62798

-thanks!

 $hail = isset($currfeature['properties']['parameters']['hailsize'][0]);

the above code generate variable value true or false. never have value data.

the following php7 code possible solution.

<?php  $json = '{"properties":{"parameters":{"hailsize":[0.50],"windgust":[70]}}}'; $currfeature = json_decode($json, true);   $hail = $currfeature['properties']['parameters']['hailsize'][0] ?? null; $wind = $currfeature['properties']['parameters']['windgust'][0] ?? null;  // check null  if ( $hail !== null ) {     echo $hail . '" hail'. php_eol; } // check null  if ( $wind !== null ) {     echo $wind . '" mph winds'. php_eol; }  if ( empty($currfeature['properties']['parameters']['windgust'][1]) ) {     echo "empty works check missing data\n"; }  if ( ! isset($currfeature['properties']['parameters']['windgust'][1]) ) {     echo "isset check missing data\n"; }

if run on command line following output:

0.5" hail 70" mph winds empty works check missing data isset check missing data

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