duanbi3385 2016-11-04 13:46 采纳率: 100%
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为foreach()提供的参数无效

Suddenly starting getting this error for the following code:

<?php foreach (get_the_terms(get_the_ID(), 'loan-club') as $cat) : ?>
<img src="<?php echo z_taxonomy_image_url($cat->term_id); ?>" title="ON LOAN AT: <?php echo $cat->name; ?>" />
<?php endforeach; ?> 

Sometimes the taxonomy 'loan-club' is empty. Could that be the problem? If so, could someone point me towards the correct code?

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2条回答 默认 最新

  • dongyi4420 2016-11-04 13:51
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    Add if condition before foreach:

    <?php
    $loan_club = get_the_terms(get_the_ID(), 'loan-club');
    
    if(is_array($loan_club)) {
        foreach ($loan_club as $cat) {
          ?>
            <img src="<?php echo z_taxonomy_image_url($cat->term_id); ?>" title="ON LOAN AT: <?php echo $cat->name; ?>" />
          <?php
        } 
    }
    ?>
    

    Look at get_the_terms() function in the documentation: https://developer.wordpress.org/reference/functions/get_the_terms/

    The function may also return WP_Error or false. If WP_Error or false is returned this will cause the error and the foreach loop breaks.

    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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