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轉自 http://wordpress.org/support/topic/plugin-yoast-breadcrumbs-warning-array_slice

PHP出現 WARNING: array_slice() expects parameter 1 to be array 的問題

解法是在array_slice()之前先去跑is_array()的判斷，把不是array的情況過濾掉

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Posted 2 years ago #

Not sure where you're getting sociable.php from phorbidden but this fixed the issue for me:

Open: yoast-posts.php

Find:
$items = array_slice($rss->items, 0, 2)

Replace with:
$items = is_array($rss->items) ? array_slice($rss->items, 0, 2) : '';

That, at least stops the code erroring out..

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