我正在嘗試從關聯數組內的關聯數組中獲取數據。該數據是這樣的：{ "keys": [ { "kid": "28f5813e327ad14caaf1bf2a12368587e882b604", "e": "AQAB", "kty": "RSA", "alg": "RS256", "n": "y-Ssr1zlqWaldUHklobfrJLZkkBYrLVKTOk9SnzkG3v2LPB-0lxLQjm8UDpdZRErn4_FfCQ6b7SAObUp2XgcD-fwmYfq34mvY-xGcvlEarcOFdVD9cwkGBdXL_VJYzqLtvuAL30mbD2TGhIp-QCV-rqb6ujh75vSmwWH1Kkx1HNkVbXHHETvX7h8kj3zmCtRdMGeQJ2YrcJHz3GnJx0M2Zpq1HiAXkYL9GUYsq9maONfsrSeACu7T0W4v-XTppsV3DwU89D_eFd8gJsONvFZPvbqyGivdXYTnYNo7Jf01IisO4JZZrNgUlVT-gPkTM1O1UXevgFY62Br8mBot6Lw6Q", "use": "sig" }, { "alg": "RS256", "n": "timkjBhJ0F7fgr5-ySitSoSNmUqYcVKgWaUd52HUYPowNwdw1vOWYHuSVol47ssOOaF7dRjgoVHyo_qNgy7rdlU0pUidiYTB6lwSAQYyvk6WAipkpzWH8cr875BMUREyN5aEy-iKsYTB3HeT-gEnLI697eETZtSB8rwlDvyRy7l0wD1GVj4SKTd4P2a2qNCgCfkZzzKqPgmIrPtwkEZb43Cz-A7AfwyXxrMljTkghKkp4zkFRtXplIGjC5LcPZRLSseTYwHP2pV4AtE5KzYxDmtDmY6RyZaMZc_WXNvKBFcO3Rypo4F63lE2x5f7EIbpATWydXq3CMLitLsPor22ow", "use": "sig", "kid": "2c3fac16b73fc848d426d5a225ac82bc1c02aefd", "e": "AQAB", "kty": "RSA" } ]}kid例如，要獲得，我必須做兩個foreach()才能獲得數據：foreach ($certs as $key => $val) { foreach($val AS $key2 => $val2){ $kid = $val2->kid; }}有沒有更快或更標準的方法來獲取這些數據？
2 回答
qq_遁去的一_1
TA貢獻1725條經驗 獲得超8個贊
您可以使用array_column，以獲得kid從陣列。首先，您需要將其解碼JSON為一個array，然后將其用作
$arr = json_decode($json, true); print_r(array_column($arr['keys'],'kid'));
Smart貓小萌
TA貢獻1911條經驗 獲得超7個贊
試試這個代碼，
$json = json_decode($certs);
foreach ($json->keys as $key => $value) {
$kid= $value->kid;
}
獲得孩子價值的簡單方法，只使用一個 foreach()。
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