Znajdowanie wszystkich obrazków w tekście. Rozbiór gramatyczny zdania.

przez Nikołajenko Maksym · Opublikowany Lipiec 9, 2012 · Zaktualizowano Sierpień 26, 2018

Znajdź wszystkie obrazy img w tekście, wyrażenie regularne php. Wszystkie obrazy są zawarte w tablicy.

/* preg_match_all match the regexp in all the $html string and output everything as 
an array in $result. "i" option is used to make it case insensitive */

preg_match_all('/<img[^>]+>/i',$html, $result); 

print_r($result);
Array
(
    [0] => Array
        (
            [0] => <img src="/Content/Img/stackoverflow-logo-250.png" alt="logo link to homepage" width="250" height="70" />
            [1] => <img class="vote-up" title="This was helpful (click again to undo)" src="/content/img/vote-arrow-up.png" alt="vote up" />
            [2] => <img class="vote-down" title="This was not helpful (click again to undo)" src="/content/img/vote-arrow-down.png" alt="vote down" />
            [3] => 
            [4] => <img class="vote-up" title="This was helpful (click again to undo)" src="/content/img/vote-arrow-up.png" alt="vote up" />

[...]
        )

)

/* preg_match_all match the regexp in all the $html string and output everything as

an array in $result. "i" option is used to make it case insensitive */

preg_match_all('/<img[^>]+>/i',$html, $result);

print_r($result);

Array

(

[0] => Array

(

[0] => <img src="/Content/Img/stackoverflow-logo-250.png" alt="logo link to homepage" width="250" height="70" />

[1] => <img class="vote-up" title="This was helpful (click again to undo)" src="/content/img/vote-arrow-up.png" alt="vote up" />

[2] => <img class="vote-down" title="This was not helpful (click again to undo)" src="/content/img/vote-arrow-down.png" alt="vote down" />

[3] =>

[4] => <img class="vote-up" title="This was helpful (click again to undo)" src="/content/img/vote-arrow-up.png" alt="vote up" />

[...]

)

Aby przeanalizować wszystkie obrazy do atrybutów alt, tytuł, src możesz użyć innego wyrażenia regularnego:

$img = array();
foreach( $result as $img_tag)
{
    preg_match_all('/(alt|title|src)=("[^"]*")/i',$img_tag, $img[$img_tag]);
}

$img = array();

foreach( $result as $img_tag)

{

preg_match_all('/(alt|title|src)=("[^"]*")/i',$img_tag, $img[$img_tag]);

}

Wynik wykonania wyrażenia regularnego dla tablicy obrazów.

print_r($img);

Array
(
    [<img src="/Content/Img/stackoverflow-logo-250.png" alt="logo link to homepage" width="250" height="70" />] => Array
        (
            [0] => Array
                (
                    [0] => src="/Content/Img/stackoverflow-logo-250.png"
                    [1] => alt="logo link to homepage"
                )

            [1] => Array
                (
                    [0] => src
                    [1] => alt
                )

            [2] => Array
                (
                    [0] => "/Content/Img/stackoverflow-logo-250.png"
                    [1] => "logo link to homepage"
                )

        )

print_r($img);

Array

(

[<img src="/Content/Img/stackoverflow-logo-250.png" alt="logo link to homepage" width="250" height="70" />] => Array

(

[0] => Array

(

[0] => src="/Content/Img/stackoverflow-logo-250.png"

[1] => alt="logo link to homepage"

)

[1] => Array

(

[0] => src

[1] => alt

)

[2] => Array

(

[0] => "/Content/Img/stackoverflow-logo-250.png"

[1] => "logo link to homepage"

)

I tak dalej …

Możesz także użyć parsera kodu HTML PHP Prosty parser HTML DOM

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