Владислав

<?php
$peremennaya = file("array.txt");
for ( $x = 0; $x < count( $peremennaya ); $x++ ) {
    
    $n = $x + 1;
    list( $src, $h2 ) = explode( ' ', $peremennaya[$x] );
    
    echo '
    <div class="_30CWHKH _3eXsdaG" str="' . $n . '">
        <div class="_1FmS6_e">
            <img alt="Химия для бассейнов" src="' . $src . '" />
         </div>
        <a class="o0XE4_n" href="#">
            <h2 class="_2PmikUJ" txt="' . $n . '">' . $h2 . '</h2>
            <div data-dy="menu-item-tag"></div>
        </a>
    </div>
    ';
    
}