Retrieve content between custom tags using Regex

Question

I need to capture content that is between a custom tag that has a default identifier, for example: <:item>Conteúdo</item>, but I’m not getting the closure of this tag to be customizable, and in this case I’m only getting it this way: <:item>Conteúdo</end>, maintaining a standard closure for all tags of the same content.

Current regex:

preg_match_all("~<:(.*?)>(.*?)</end>~si", $conteudo, $retorno);

What would be the regular expression to find the opening tag and its relative closing tag? even if there is an inheritance of parents and children with the same tag name.

Answer 1

1) If you intend to use ONLY the content of the tag, you can use the ER below, in case it removes everything between <>:

$conteudo = '<:item>Conteúdo</item>';
print_r( preg_replace("/<.*?>/", "", $conteudo) );

Example available on ideone

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2) If you intend to use the tag itself and the content, you can use the ER below:

$conteudo = '<:item>Conteúdo</item>';
preg_match_all( '~<.+?>(.+?)<\/.+?>~' , $conteudo , $retorno );
echo $retorno[1][0];

Example available on ideone

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Updating

Step 1) replace <...> by a marker |
Upshot: |HEADER||MAIN|ITEM||

Step 3) Remove Double Markers || by simple |
Upshot: |HEADER|MAIN|ITEM|

Step 4) Break the string into the markers and filter the null values
Upshot: array( 1 => 'HEADER' , 2 => 'MAIN' , 3 => 'ITEM' )

$string = '<:header>HEADER</header><:main>MAIN<:item>ITEM</item></main>';

// passo 1
$string = preg_replace( '/<.*?>/' , '|' , $string );

// passo 2
$string = preg_replace('/\|+/', '|', $string);

// passo 3
$string = array_filter( explode( '|' , $string ) );

Note that this NAY is ideal, just solves a problem. The way you generate this string is inappropriate. See a demo on ideone

Answer 2

I don’t know if this is the way you want it, but it works:

$html = "<:item>ConteúdoA</item><:valor>ConteúdoB</valor><:tag>ConteúdoC</tag><:teste>ConteúdoD</teste>";
preg_match_all("/<:(.*?)>/", $html, $arrTag);

foreach($arrTag[1] as $tag)
{
echo $tag;
preg_match_all('/<:'.$tag.'>(.+?)<\/'.$tag.'>/sm', $html, $conteudo);
print_r($conteudo);
}