如何使文件附件可选？

Question

$sjb_attach_resume = '<div class="col-md-3 col-xs-12">'
        . '<label for="applicant_resume">' . apply_filters('sjb_resume_label', __('Attach Resume', 'simple-job-board')) . '<span class="sjb-required required">*</span></label>'
        . '</div>'
        . '<div class="col-md-9 col-xs-12">
                            <div class="form-group">'
        . '<input type="file" name="applicant_resume" id="applicant-resume" class="sjb-attachment form-control "' . apply_filters('sjb_resume_required', 'required="required"') . '>'
        . '<span class="sjb-invalid-attachment validity-note" id="file-error-message"></span>'
        . '</div>'
        . '</div>'
        . '<div class="clearfix"></div>';
echo apply_filters('sjb_attach_resume', $sjb_attach_resume);

Answer 1

我假设你没有写代码，因为你问这个。 诚实和恭敬地，您应该在玩文件上传等之前学习基础知识，因为如果处理不当，这可能是一个重大的安全风险。

至于您的问题，您可以从文件输入中完全删除 required-attribute ：

$sjb_attach_resume = '<div class="col-md-3 col-xs-12">'
        . '<label for="applicant_resume">' . apply_filters('sjb_resume_label', __('Attach Resume', 'simple-job-board')) . '<span class="sjb-required required">*</span></label>'
        . '</div>'
        . '<div class="col-md-9 col-xs-12">
                            <div class="form-group">'
        . '<input type="file" name="applicant_resume" id="applicant-resume" class="sjb-attachment form-control ">'
        . '<span class="sjb-invalid-attachment validity-note" id="file-error-message"></span>'
        . '</div>'
        . '</div>'
        . '<div class="clearfix"></div>';
echo apply_filters('sjb_attach_resume', $sjb_attach_resume);

...或通过修改应用的过滤器来删除它，方法是将代码片段添加到主题的 functions.php 文件中：

add_filter( 'sjb_resume_required', '__return_empty_string' );