mysqli_stmt::bind_param()：类型定义字符串中的元素数与绑定变量数不匹配

Posted 2023-02-19

【中文标题】mysqli_stmt::bind_param()：类型定义字符串中的元素数与绑定变量数不匹配

【英文标题】：mysqli_stmt::bind_param(): Number of elements in type definition string doesn't match number of bind variables

【发布时间】：2013-06-18 16:47:11

【问题描述】：

因此，我需要执行涉及 65 个表单输入的大量令人头疼的查询，需要使用 mysqli 准备好的语句将其注入数据库。

我遇到的问题是它说我尝试调用bind_param 的变量数与我正在使用的“s”数不匹配。 我数了十几次，看不出我在哪里出错了。有 65 个变量和 65 个“s”。

谁能看到我遗漏的东西？还是我可能以不正确的方式使用了 bind_param 方法？

// Preparing our query statement via mysqli which will auto-escape all bad characters to prevent injection
$query3 = 'INSERT INTO datashep_AMS.COMPLETE_APPLICATIONS (
    project_name,
    status,
    funding_requested,
    project_title,
    program,
    county,
    parish,
    name_of_watercourse,
    which_is_a_tributary_of,
    name_of_applicant,
    contact_person_or_project_supervisor,
    relationship_to_organization,
    business_phone,
    home_phone,
    email,
    signature_of_thesis_or_study_supervisor,
    mailing_address,
    postal_code,
    website,
    mailing_address_for_payment,
    hst_registration_no,
    total_cost_dollar,
    total_cost_percent,
    dollar_amount_requested_from_nbwtf,
    percent_amount_requested_from_nbwtf,
    descriptive_summary,
    background_of_organization,
    mandate,
    years_in_existence,
    membership,
    accomplishments,
    previous_project_name,
    previous_project_number,
    previous_project_amount_received_from_nbwtf,
    summary_of_activities,
    summary_of_Results,
    project_title_2,
    reason_and_or_purpose,
    objectives,
    project_description,
    methods,
    equipment_and_materials_required,
    personnel_required,
    proposed_start_date,
    proposed_end_date,
    type_of_data_to_be_stored,
    where_will_it_be_housed,
    monitoring,
    short_term_achievement,
    long_term_achievement,
    previous_studies,
    required_permits,
    consultants,
    short_term_commitment,
    long_term_commitment,
    project_duration,
    project_evaluation,
    promotion_of_project,
    promotion_of_client,
    publication_of_results,
    community_benefits,
    effects_on_traditional_uses,
    possible_changes_in_public_access_to_areas,
    possible_impact_on_wildlife_and_or_environment,
    likelihood_of_future_requests_for_funding,
    list_all_other_funding_sources_for_this_project
) VALUES (
    ?,
    ?,
    ?,
    ?,
    ?,
    ?,
    ?,
    ?,
    ?,
    ?,
    ?,
    ?,
    ?,
    ?,
    ?,
    ?,
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)';

// "Preparing" the query using mysqli->prepare(query) -- which is the equivalent of mysql_real_escape_string -- in other words, it's the SAFE database injection method
$stmt = $dbConnection->prepare($query3);

// "Bind_param" == replace all the "?"'s in the aforementioned query with the variables below

$stmt->bind_param("s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s", $project_name, $status, $funding_requested, $project_title, $program, $county, $parish, $name_of_watercourse, $which_is_a_tributary_of, $name_of_applicant, $contact_person_or_project_supervisor, $relationship_to_organization, $business_phone, $home_phone, $email, $signature_of_thesis_or_study_supervisor, $mailing_address, $postal_code, $website, $mailing_address_for_payment, $hst_registration_no, $total_cost_dollar, $total_cost_percent, $dollar_amount_requested_from_nbwtf, $percent_amount_requested_from_nbwtf, $descriptive_summary, $background_of_organization, $mandate, $years_in_existence, $membership, $accomplishments, $previous_project_name, $previous_project_number, $previous_project_amount_received_from_nbwtf, $summary_of_activities, $summary_of_Results, $project_title_2, $reason_and_or_purpose, $objectives, $project_description, $methods, $equipment_and_materials_required, $personnel_required, $proposed_start_date, $proposed_end_date, $type_of_data_to_be_stored, $where_will_it_be_housed, $monitoring, $short_term_commitment, $long_term_achievement, $previous_studies, $required_permits, $consultants, $short_term_commitment, $long_term_commitment, $project_duration, $project_evaluation, $promotion_of_project, $promotion_of_client, $publication_of_results, $community_benefits, $effects_on_traditional_uses, $possible_changes_in_public_access_to_areas, $possible_impact_on_wildlife_and_or_environment, $likelihood_of_future_requests_for_funding, $list_all_other_funding_sources_for_this_project);

// Perform the actual query!
$stmt->execute();

【问题讨论】：

你从哪里得到逗号分隔的格式？

全面披露：我是初学者，所以我真的不知道更好的方法（目前）。

@SamuelStiles 我认为您真的应该考虑是否需要 数据库表中的 65 列。如果您有多个表和连接，它可能会更易于管理。

@Your 常识：php 插入查询的当前和更好的方法是什么？

@SuKu 对于常规插入查询只需使用准备好的语句

【参考方案1】：

bind_param 中的字符不应以逗号分隔。

如果您必须绑定两个变量，请执行以下操作：

$stmt->bind_param('ss', $firstvariable, $secondvariable);

【讨论】：

谢谢！鼓舞人心！

【参考方案2】：

有 65 个字符串参数，所以如果有 65 个 s，你就有正确的数字。但是出现错误是因为您用逗号分隔了 s。而不是$stmt->bind_param("s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s,s..." 应该是

$stmt->bind_param("sssssssssssssssss..."

这应该可以解决您的错误。

【参考方案3】：

字符串中的字符不能用逗号分隔：

$stmt->bind_param("sss...", /* variables */);

您可以在the manual page 的示例中看到这种格式。