MySQL子字符串函数提取URL中的字符串

Question

I have a URL like {"gclid":"Cj0KEQjw7dfKBRCdkKrvmfKtyeoBEiQAch0egQ97fbdyRpkv6sUmkYHXnTKlOWMywt3SceAol-1umzwaAmsk8P8HAQ","sem_keyword":"+turbolader +einbau","sem_creativeid":"165357442696","sem_matchtype":"b","sem_network":"g","sem_device":"m","sem_placement":"","sem_target":"","sem_adposition":"1t2","sem_param1":"","sem_param2":"","sem_campaignid":"629608072","sem_adgroupid":"38134265464","sem_targetid":"kwd-26982332150","sem_location":"1004645"}

from where I need to extract Cj0KEQjw7dfKBRCdkKrvmfKtyeoBEiQAch0egQ97fbdyRpkv6sUmkYHXnTKlOWMywt3SceAol-1umzwaAmsk8P8HAQ , ie the data between two double quotes after gclid . I have tried all substring functions but I'm not able to get even close.

Answer 1

您可以使用MySQL JSON函数：

select json_unquote(json_extract(url, '$.gclid'))

Answer 2

$json = file_get_contents('url_here');
$obj = json_decode($json);
echo $obj->gclid;

For this to work, file_get_contents requires that allow_url_fopen is enabled. This can be done at runtime by including ini_set("allow_url_fopen", 1);