Question

这是我的查询;在我的数据库中，所有leanguage都设置为utf8_general;如果存在某个字符，则此查询返回null，不知道是否只有重音

require_once('db_connect.php');

$sql = "SELECT avwp_posts.id, cast(avwp_posts.post_content as char(200) ) AS post_content, cast(avwp_posts.post_title as char(60) ) AS post_title, avwp_posts.post_type, avwp_posts.post_date_gmt, avwp_users.display_name as nicename FROM avwp_posts JOIN avwp_users ON (avwp_posts.post_author=avwp_users.id) WHERE post_type='post' AND post_status='publish' ORDER BY post_date_gmt DESC";
$result = $con->query($sql);

if ($result->num_rows > 0) {
// output data of each row
while($row = $result->fetch_assoc()) {
    $myArray[] = $row;
    echo $myArray['post_content'];

    }
}else {
    echo json_encode("NOTOK");
}

echo json_encode($myArray);

$con->close();

这是查询的结果

[{“id”：“74”，“post_content”：null，“post_title”：null，“post_type”：“post”，“post_date_gmt”：“2017-03-25 12:54:35”， “nicename”： “ridertest”}，{ “ID”： “72”， “POST_CONTENT”：NULL， “POST_TITLE”： “wwwwwwwwwwwwwwwww”， “post_type”： “后”， “post_date_gmt”：“2017年3月25日12点33分37" 秒， “nicename”： “ridertest”}，{ “ID”： “66”， “POST_CONTENT”：NULL， “POST_TITLE”： “porova”， “post_type”： “后”， “post_date_gmt” ： “2017年3月25日12点30分06秒”， “nicename”： “ridertest”}，{ “ID”： “64”， “POST_CONTENT”： “ytytytyttytytytttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttvvvvvvvv”， “POST_TITLE”： “ytytytytytyt”，“post_type “：” 后 “ ”post_date_gmt“： ”2017年3月25日12时28分五十秒“， ”nicename“： ”ridertest“}，{ ”ID“： ”56“， ”POST_CONTENT“： ”aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa“，” post_title“：”Prova Prova Prova Prova Prova Prova Prova Prova Prova Prova“，”po st_type“：”post“，”post_date_gmt“：”2017-03-25 11:34:13“，”nicename“：”ridertest“}，{”id“：”52“，”post_content“：null，”post_title “：”Prova primo articolo，blu giallo rosso verde azzurro“，”post_type“：”post“，”post_date_gmt“：”2017-03-25 11:14:46“，”nicename“：”ridertest“}，{” id“：”1“，”post_content“：null，”post_title“：”Il Primo Articolo“，”post_type“：”post“，”post_date_gmt“：”2011-07-05 12:19:18“，”nicename “：” ridertest“}]

如果我使用substring（char（200））一部分没有重音的char返回一个值，否则返回null

这是var_dump结果

array（7）{[0] =＆gt; array（6）{[“id”] =＆gt; string（2）“74”[“post_content”] =＆gt; string（200）“Un trionfo di retorica，frutto di divisioni e diktat di Paesi（Polonia e Grecia，in primis）che hanno preteso modifiche al testo prima di garantire il proprio placet.Sull'Europaapiùvelocità，annun”[“post_title “] =＆GT; string（60）“Nei Trattati quel riferimento soft a un'Europa a”intensità“[”post_type“] =＆gt; string（4）”post“[”post_date_gmt“] =＆gt; string（19）”2017-03- 25 12:54:35“[”nicename“] =＆gt; string（9）”ridertest“} [1] =＆gt; array（6）{[”id“] =＆gt; string（2）”72“[ “post_content”] =＆gt; string（200）“Milano（/”[“post_title”] =＆gt; string（17）“wwwwwwwwwwwwwww”[“post_type”] =＆gt; string（4）“post”[“post_date_gmt” ] =＆gt; string（19）“2017-03-25 12:33:37”[“nicename”] =＆gt; string（9）“ridertest”} [2] =＆gt; array（6）{[“id “] =＆gt; string（2）”66“[”post_content“] =＆gt; string（200）”Milano（/“[”post_title“] =＆gt; string（6）”porova“[”post_type“] = ＆gt; string（4）“post”[“post_date_gmt”] =＆gt; string（19）“2017-03-25 12:30:06”[“nicename”] =＆gt; string（9）“ridertest”} [ 3] =＆GT;阵列（6）{[ “ID”] =＆GT;串（2） “64”[ “POST_CONTENT”] =＆GT;串（141）， “ytytytyttytytytttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttvvvvvvvv”[ “POST_TITLE”] =＆GT; ST ring（12）“ytytytytytyt”[“post_type”] =＆gt; string（4）“post”[“post_date_gmt”] =＆gt; string（19）“2017-03-25 12:28:50”[“nicename”] =＆gt; string（9）“ridertest”} [4] =＆gt; array（6）{[“id”] =＆gt; string（2）“56”[“post_content”] =＆gt;串（200） “aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa”[ “POST_TITLE”] =＆GT; string（60）“Prova Prova Prova Prova Prova Prova Prova Prova Prova Prova”[“post_type”] =＆gt; string（4）“post”[“post_date_gmt”] =＆gt; string（19）“2017-03-25 11:34:13”[“nicename”] =＆gt; string（9）“ridertest”} [5] =＆gt; array（6）{[“id”] =＆gt; string（2）“52”[“post_content”] =＆gt; string（200）“lapiùpiccolaquantitàdiuna sostanza in grado di conservarne la composizione chimica e di determinarne leproprietàeil comportamento chimico e chimico-fisico;puòesterrecostituita da dueopiùa”[“post_title”] =＆gt; string（52）“Prova primo articolo，blu giallo rosso verde azzurro”[“post_type”] =＆gt; string（4）“post”[“post_date_gmt”] =＆gt; string（19）“2017-03-25 11:14:46”[“nicename”] =＆gt; string（9）“ridertest”} [6] =＆gt; array（6）{[“id”] =＆gt; string（1）“1”[“post_content”] =＆gt; string（200）“Puoi scegliere il tema，personalizzare la toolbar，guadagnare con i banner pubblicitari e iniziare a scrivere.Modifica questo arti”[“post_title”] =＆gt; string（17）“Il Primo Articolo”[“post_type”] =＆gt; string（4）“post”[“post_date_gmt”] =＆gt; string（19）“2011-07-05 12:19:18”[“nicename”] =＆gt; string（9）“ridertest”}}

正如你在这里看到的，我有所有的数据，为什么json_encode将它们设置为null ??

在MySQL查询结果= null如果字母

0 个答案: