PHP foreach insert into same array as it took the data from [duplicate]

Question

I have an array called $posts which i ran a foreach on like this

foreach ($posts as $post => $content) {

    $find    = array('~\[image="(https?://.*?\.(?:jpg|jpeg|gif|png|bmp))"\](.*?)\[/image\]~s');
    $replace = array('<img src="$1" alt="" /><p>$2</p>');
    $content = preg_replace($find, $replace, $content);

    }

what i need to do now is to save $content into the same array at the same index as before, how can i do that?

Note that my array has several fields like Id, Author, content, title & date.

Amal · Accepted Answer · 2013-08-20 18:14:56Z

4

Pass by reference:

foreach ($posts as $post =>  & $content) {

    $find    = array('~\[image="(https?://.*?\.(?:jpg|jpeg|gif|png|bmp))"\](.*?)\[/image\]~s');
    $replace = array('<img src="$1" alt="" /><p>$2</p>');
    $content = preg_replace($find, $replace, $content);

    }

answered Aug 20, 2013 at 18:14

Amal

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6 Comments

Nolan Knill Over a year ago

Clever, I would have done: $posts[$post] = $content, but I like this better.

Sam Pettersson Over a year ago

I output the array inside my view and get 0 difference, it's exactly the same as it is in the database after i added the & before $content.

Amal Over a year ago

@SamPettersson: try doing a print_r($content); outside the foreach.

Sam Pettersson Over a year ago

@AmalMurali Returns what's inside the database.

Amal Over a year ago

@SamPettersson: there's a difference between the two.

|

Marc B · Accepted Answer · 2013-08-20 18:15:49Z

1

foreach($post as $post => $content) {
    .... stuff happens here ...
    $posts[$post] = $content;
}

The alternative is to use a reference:

foreach($post as $post => &$content) {
    ... stuff happens here ...
}

but this sort of code is discouraged, because it can lead to very nasty unexpected side effects later if you happen to re-use the $content varaible later in the same scope.

answered Aug 20, 2013 at 18:15

Marc B

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1 Comment

Sam Pettersson Over a year ago

This seems to scramble all the data, the output just becomes "{"

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