<?php
$jsonstring = ' {"Pessoas" :
[
{"Nome": "Welson Play", "Idade":19},
{"Nome": "Stephanie", "Idade":15},
{"Nome": "João Pedro", "Idade":17}
]
}';
foreach($obj as $chave => $vlor) {
echo $chave;
}
PD9waHAKJGpzb25zdHJpbmcgPSAnIHsiUGVzc29hcyIgOgogICAgICAgICAgWyAKICAgICAgICAgICB7Ik5vbWUiOiAiV2Vsc29uIFBsYXkiLCAiSWRhZGUiOjE5fSwgCiAgICAgICAgICAgeyJOb21lIjogIlN0ZXBoYW5pZSIsICJJZGFkZSI6MTV9LAogICAgICAgICAgIHsiTm9tZSI6ICJKb8OjbyBQZWRybyIsICJJZGFkZSI6MTd9CiAgICAgICAgICBdIAogICAgfSc7Cgokb2JqID0ganNvbl9kZWNvZGUoJGpzb25zdHJpbmcpOwoKZm9yZWFjaCgkb2JqIGFzICRjaGF2ZSA9PiAkdmxvcikgewoJZWNobyAkY2hhdmU7CQp9