让我们穿过acf/validate_value 逻辑筛选。。。

我假设您的两个代码段都是相同的代码段，并且您没有同时执行它们（如@Buttered_Toast 指出）。

这是您的代码（请参阅我添加的注释）

下面的代码假设dfg_service_type acf字段是数字字段

/**
  * @param mixed $valid Whether or not the value is valid (boolean) or a custom error message (string).
  * @param mixed $value The field value.
  * @param array $field The field array containing all settings.
  * @param string $input_name The field DOM element name attribute.
  * @return bool|string
 */
function dfg_acf_validate_value($valid, $value, $field, $input_name) {

    // $valid true by default
    // but if $field[\'required\'] is true then
    // valid is set to false if the value is empty, but allow 0 as a valid value
    if( $valid !== true ) {
        return $valid;
    }

    // set value if value is true and cast value to integer else set bool false
    $value = $value ? (int)$value : false;

    // here is your first snippet cleaned up...
    // you are simply just checking if value is not 30 and not 360
    // if anything but 30 or 360, the below condition will return __( \'Please choose a valid type!\' ); 
    // is this your intention?  
    if( $value && ( $value !== 30 && $value !== 360 )) {
        return __( \'Please choose a valid type!\' );
    }

    /**
        // here is another option to check if $value is greater than or equal too 30 and less than or equal too 360...
        if( $value && ( $value >= 30 && $value <= 360 )) {
            return __( \'Please choose a valid type!\' );
        }
    */    

    // return valid and save value if above value conditions are not run
    return $valid;

}

// init the filter perform custom validation on the field’s `$value` before it is saved into the database.
// for all acf fields with the name `dfg_service_type`
add_filter(\'acf/validate_value/name=dfg_service_type\', \'dfg_acf_validate_value\', 10, 4);

更新

将一些调试函数添加到functions.php 哪个转储然后退出。。。

假设您的php版本是5.6以上，所以variable-length arg lists 代币工程

<?php
/**
 * functions.php
 */

// dump and exit function
function dd(...$args) {
    dump(...$args);
    exit;
}

// dump
function dump(...$args) {
    foreach ($args as $dump) {
        echo \'<pre class="dd">\' . print_r($dump, true) . \'</pre>\';
    }
}

function dfg_acf_validate_value($valid, $value, $field, $input_name) {

  // test this is getting hit
  dd($valid, $value, $field, $input_name);    

}

add_filter(\'acf/validate_value/name=dfg_service_type\', \'dfg_acf_validate_value\', 10, 4);

让我知道你进展如何，有什么回报，我会尽力帮助你。