我正在尝试使用此命令添加一些文本，包含在我的 php 文件中:

$sql = "INSERT INTO $this->table_name_category (name, marker_icon) VALUES ('".$name."', '".$marker_icon."')";

在英文字符中一切看起来都很好，但在希腊字符中，解析的文本正在转换为问号“???????”

还有什么我必须注意的吗？有没有办法告诉 INSERT 命令使用 UTF8 以支持希腊字符？

提前致谢。

我的数据库设置为 utf8_unicode_ci(表也是)。

我的代码是:

<?php

class Store_locator_wpress_db {

    var $wpdb;
    var $table_name;
    var $table_name_category;

    function Store_locator_wpress_db() {
        global $wpdb;
        $this->wpdb = $wpdb;
        $this->table_name = $wpdb->prefix . "store_wpress";
        $this->table_name_category = $wpdb->prefix . "store_wpress_category";
        $this->table_name_category2 = $wpdb->prefix . "store_wpress_category2";
    }

    function setup_tables() {
        self::create_tables();
        self::update_stores_table();
        //self::update_categories_table();
    }

    function update_stores_table() {
        $sql = "DESCRIBE $this->table_name";
        $result = $this->wpdb->get_results($sql, 'ARRAY_N');

        for($i=0; $i<count($result); $i++) {
            $field[] = $result[$i][0];
        }

        if(!in_array('category_id',$field)) {
            $sql = "ALTER TABLE `$this->table_name` ADD `category_id` INT NOT NULL AFTER `post_id`";
            $this->wpdb->query($sql);
        }
        if(!in_array('category2_id',$field)) {
            $sql = "ALTER TABLE `$this->table_name` ADD `category2_id` INT NOT NULL AFTER `category_id`";
            $this->wpdb->query($sql);
        }
        if(!in_array('country',$field)) {
            $sql = "ALTER TABLE `$this->table_name` ADD `country` VARCHAR( 60 ) NOT NULL AFTER `email`";
            $this->wpdb->query($sql);
        }
        if(!in_array('city',$field)) {
            $sql = "ALTER TABLE `$this->table_name` ADD `city` VARCHAR( 60 ) NOT NULL AFTER `email`";
            $this->wpdb->query($sql);
        }
    }

    function update_categories_table() {
        $sql = "DESCRIBE $this->table_name_category";
        $result = $this->wpdb->get_results($sql, 'ARRAY_N');

        for($i=0; $i<count($result); $i++) {
            $field[] = $result[$i][0];
        }

        if(!in_array('marker_icon',$field)) {
            $sql = "ALTER TABLE `$this->table_name_category` ADD `marker_icon` VARCHAR( 200 ) NOT NULL AFTER `name`";
            $this->wpdb->query($sql);
        }
    }

    function create_tables() {
        $sql = "CREATE TABLE IF NOT EXISTS " . $this->table_name . " (
        `id` BIGINT NOT NULL AUTO_INCREMENT PRIMARY KEY ,
        `user_id` BIGINT NOT NULL ,
        `post_id` BIGINT NOT NULL ,
        `category_id` INT NOT NULL ,
        `name` VARCHAR( 160 ) NOT NULL ,
        `logo` VARCHAR( 160 ) NOT NULL ,
        `address` VARCHAR( 160 ) NOT NULL ,
        `lat` VARCHAR( 20 ) NOT NULL ,
        `lng` VARCHAR( 20 ) NOT NULL ,
        `url` VARCHAR( 160 ) NOT NULL ,
        `description` TEXT NOT NULL ,
        `tel` VARCHAR( 30 ) NOT NULL ,
        `email` VARCHAR( 60 ) NOT NULL ,
        `created` DATETIME NOT NULL
        ) ENGINE = MYISAM;";
        $this->wpdb->query($sql);

        $sql = "CREATE TABLE IF NOT EXISTS " . $this->table_name_category . " (
        `id` INT NOT NULL AUTO_INCREMENT PRIMARY KEY ,
        `name` VARCHAR( 120 ) NOT NULL,
        `marker_icon` VARCHAR( 200 ) NOT NULL
        ) ENGINE = MYISAM ;";

        $this->wpdb->query($sql);

        $sql = "CREATE TABLE IF NOT EXISTS " . $this->table_name_category2 . " (
        `id` INT NOT NULL AUTO_INCREMENT PRIMARY KEY ,
        `name` VARCHAR( 120 ) NOT NULL
        ) ENGINE = MYISAM ;";

        //$this->wpdb->query($sql);
    }

    function get_locations($criteria) {
        $lat = $criteria['lat'];
        $lng = $criteria['lng'];
        $page_number = $criteria['page_number'];
        $nb_display = $criteria['nb_display'];
        $distance_unit = $criteria['distance_unit'];
        $category_id = $criteria['category_id'];
        $category2_id = $criteria['category2_id'];
        $radius_id = $criteria['radius_id'];

        $start = ($page_number*$nb_display)-$nb_display;

        if($distance_unit=='miles') $distance_unit='3959'; //miles
        else $distance_unit='6371'; //km

        $sql = "SELECT s.*, c.marker_icon, c.name category_name,
        ( $distance_unit * acos( cos( radians('".$lat."') ) * cos( radians( lat ) ) * cos( radians( lng ) - radians('".$lng."') ) + sin( radians('".$lat."') ) * sin( radians( lat ) ) ) ) AS distance 
        FROM ".$this->table_name." s
        LEFT JOIN ".$this->table_name_category." c
        ON s.category_id=c.id
        WHERE 1 ";

        if($category_id!='') $sql .= " AND category_id='$category_id'";
        if($category2_id!='') $sql .= " AND category2_id='$category2_id'";

        if($radius_id!='') $sql .= " HAVING distance<='".$radius_id."'";

        if($lat!=''&&$lng!='') $sql .= " ORDER BY distance";
        else $sql .= " ORDER BY id DESC";

        if($nb_display!='') $sql .= " LIMIT $start, $nb_display";

        $locations = $this->wpdb->get_results($sql, 'ARRAY_A');

        return $locations;
    }

    function return_nb_stores($criteria=array()) {
        $category_id = $criteria['category_id'];

        $sql = "SELECT count(*) as nb 
        FROM $this->table_name WHERE 1";

        if($category_id!='') $sql .= " AND category_id='$category_id'";

        $results = $this->wpdb->get_results($sql, 'ARRAY_A');
        return $results[0];
    }

    function return_stores($criteria=array()) {
        $id = $criteria['id'];
        $post_id = $criteria['post_id'];
        $category_id = $criteria['category_id'];

        $sql = "SELECT s.*, c.marker_icon 
        FROM $this->table_name s
        LEFT JOIN ".$this->table_name_category." c
        ON s.category_id=c.id
        WHERE 1";

        if($id>0) $sql .= " AND s.id='$id'";
        if($post_id>0) $sql .= " AND s.post_id='$post_id'";
        if($category_id>0) $sql .= " AND s.category_id='$category_id'";

        $sql .= ' ORDER BY s.created DESC';

        $results = $this->wpdb->get_results($sql, 'ARRAY_A');
        return $results;
    }

    function return_categories($criteria=array()) {
        $id = $criteria['id'];
        $sql = "SELECT * FROM $this->table_name_category WHERE 1";
        if($id>0) $sql .= " AND id='$id'";
        $sql .= ' ORDER BY name';

        $results = $this->wpdb->get_results($sql, 'ARRAY_A');
        return $results;
    }

    function return_categories2($criteria=array()) {
        $id = $criteria['id'];
        $sql = "SELECT * FROM $this->table_name_category2 WHERE 1";
        if($id>0) $sql .= " AND id='$id'";
        $sql .= ' ORDER BY name';

        $results = $this->wpdb->get_results($sql, 'ARRAY_A');
        return $results;
    }

    function return_nb_stores_by_category() {
        $sql = 'SELECT c.id, count(*) nb 
        FROM '.$this->table_name.' s, '.$this->table_name_category.' c 
        WHERE s.category_id=c.id GROUP BY s.category_id';
        $results = $this->wpdb->get_results($sql, 'ARRAY_A');
        for($i=0; $i<count($results); $i++) {
            $storesCat[$results[$i]['id']] = $results[$i]['nb'];
        }
        return $storesCat;
    }

    function return_nb_stores_by_category2() {
        $sql = 'SELECT c.id, count(*) nb 
        FROM '.$this->table_name.' s, '.$this->table_name_category2.' c 
        WHERE s.category2_id=c.id GROUP BY s.category2_id';
        $results = $this->wpdb->get_results($sql, 'ARRAY_A');
        for($i=0; $i<count($results); $i++) {
            $storesCat[$results[$i]['id']] = $results[$i]['nb'];
        }
        return $storesCat;
    }

    function delete_store($id) {
        $user_id = get_current_user_id();
        $sql = "SELECT * FROM $this->table_name WHERE id='$id' AND user_id='$user_id'";
        $results = $this->wpdb->get_results($sql, 'ARRAY_A');
        if(count($results)>0) {
            $sql = "DELETE FROM $this->table_name WHERE id='%d'";
            $this->wpdb->query($this->wpdb->prepare($sql, $id));
            return 'The store has been deleted.';
        }
        else {
            return 'Only the author of this store, can delete it.';
        }
    }

    function delete_category($id) {
        $sql = "SELECT * FROM $this->table_name WHERE category_id='$id'";
        $results = $this->wpdb->get_results($sql, 'ARRAY_A');
        if(count($results)>0) {
            return "You cannot delete this category because it's containing ".count($results)." store(s). Please delete the stores first then try again.";
        }
        else {
            $sql = "DELETE FROM $this->table_name_category WHERE id='%d'";
            $this->wpdb->query($this->wpdb->prepare($sql, $id));
            return 'The category has been deleted.';
        }
    }

    function delete_category2($id) {
        $sql = "SELECT * FROM $this->table_name WHERE category2_id='$id'";
        $results = $this->wpdb->get_results($sql, 'ARRAY_A');
        if(count($results)>0) {
            return "You cannot delete this category because it's containing ".count($results)." store(s). Please delete the stores first then try again.";
        }
        else {
            $sql = "DELETE FROM $this->table_name_category2 WHERE id='%d'";
            $this->wpdb->query($this->wpdb->prepare($sql, $id));
            return 'The category has been deleted.';
        }
    }

    function update_store($criteria) {
        $sql = "UPDATE $this->table_name SET 
        post_id='".$criteria['post_id']."', category_id='".$criteria['category_id']."', category2_id='".$criteria['category2_id']."', 
        name='".$criteria['name']."', logo='".$criteria['logo']."', url='".$criteria['url']."', 
        address='".$criteria['address']."', lat='".$criteria['lat']."', lng='".$criteria['lng']."', 
        description='".$criteria['description']."', tel='".$criteria['tel']."', email='".$criteria['email']."'
        WHERE id='".$criteria['id']."'";
        $this->wpdb->query($sql);
    }

    function update_category($criteria) {
        $sql = "UPDATE $this->table_name_category SET name='".$criteria['name']."', marker_icon='".$criteria['marker_icon']."' 
        WHERE id='".$criteria['id']."'";
        $this->wpdb->query($sql);
    }

    function update_category2($criteria) {
        $sql = "UPDATE $this->table_name_category2 SET name='".$criteria['name']."' 
        WHERE id='".$criteria['id']."'";
        $this->wpdb->query($sql);
    }

    function add_store($criteria) {
        $sql = "INSERT INTO $this->table_name 
        (user_id, post_id, category_id, category2_id, name, logo, address, lat, lng, url, description, tel, email, created) 
        VALUES ('".$criteria['user_id']."', '".$criteria['post_id']."', '".$criteria['category_id']."', '".$criteria['category2_id']."', '".$criteria['name']."', '".$criteria['logo']."', '".$criteria['address']."', '".$criteria['lat']."', '".$criteria['lng']."', 
        '".$criteria['url']."', '".$criteria['description']."', '".$criteria['tel']."', '".$criteria['email']."', '".date('Y-m-d H:i:s')."')";
        //echo $sql.'<br>';
        $this->wpdb->query($sql);
    }

    function add_category($criteria=array()) {
        $name = $criteria['name'];
        $marker_icon = $criteria['marker_icon'];
        $sql = "INSERT INTO $this->table_name_category (name, marker_icon) VALUES ('".$name."', '".$marker_icon."')";
        $this->wpdb->query($sql);
    }

    function add_category2($criteria=array()) {
        $name = $criteria['name'];

        $sql = "INSERT INTO $this->table_name_category2 (name) VALUES ('".$name."')";
        $this->wpdb->query($sql);
    }
}

?>