'Why is there a string saved in my serialized array?

Below is how I serialize my array.

$featured_image_id = $arg['thumbnail_id'];
$data = serialize( array( $featured_image_id ) );

update_post_meta( $arg['post_id'], 'images', $data );

What I get in my db table is s:17:"a:1:{i:0;i:1955;}"; with a string in front.

How do I remove the string? I just need "a:1:{i:0;i:1955;}"

phparrayswordpressserialization


Solution 1:[1]

Ok, I fixed it.

I don't need to serialize the array. It will be serialized by update_post_meta function as according to https://developer.wordpress.org/reference/functions/update_post_meta/

WordPress doc is always not clear. It should change from saying "Metadata value. Must be serializable if non-scalar." to "Metadata value. Value will be automatically serialized if non-scalar." PHP doc is still the best.

Sources

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Source: Stack Overflow

Solution Source
Solution 1 codanad376

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