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<?php $data = [ ['post_content' => '<div id="foo"></div>'], ['post_content' => '<div id="bar"></div>'], ]; array_walk($data, function(&$value, $key) { $value['post_content'] = htmlentities($value['post_content']); }); print_r($data);
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => Array ( [post_content] => &lt;div id=&quot;foo&quot;&gt;&lt;/div&gt; ) [1] => Array ( [post_content] => &lt;div id=&quot;bar&quot;&gt;&lt;/div&gt; ) )

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