對(duì)于虛擬現(xiàn)實(shí)娛樂(lè)體驗(yàn)館來(lái)說(shuō)，PHP可能主要用于處理用戶數(shù)據(jù)、管理內(nèi)容或者構(gòu)建后端系統(tǒng)使用substr()函數(shù)來(lái)截取用戶的評(píng)論，只顯示前綴和后綴的部分，以增加用戶體驗(yàn)。

```php

$str = "這是條非常長(zhǎng)的用戶評(píng)論只顯示前面和后面的部分";

$prefix_length = ;

$suffix_length = ;

$prefix = substr($str, , $prefix_length);

$suffix = substr($str, -$suffix_length);

echo $prefix . '... ' . $suffix;

```

```php

$ingredients = "小麥, 肉類副產(chǎn)品, 玉米, 魚粉, 植物油, 脫水家禽肉, 天然香料, 鈣磷酸鹽, DL-蛋氨酸,...";

$ingredients_list = explode(",", $ingredients);

$count = count($ingredients_list);

$first_ingredients = array_slice($ingredients_list, , );

$last_ingredients = array_slice($ingredients_list, -);

echo implode(", ", $first_ingredients) . "..., ..., " . implode(", ", $last_ingredients);

```

```php

$gene_sequence = "ATCGTAGCTAGCTACGTA...";

$start_position = ;

$end_position = ;

$substring = substr($gene_sequence, $start_position, $end_position-$start_position+);

echo $substring;

```

```php

$track_info = "貨物從北京出發(fā)，途徑上海，廣州，到達(dá)深圳...";

$start_location = substr($track_info, strpos($track_info, "從") + , strpos($track_info, "途徑") - strpos($track_info, "從") - );

$end_location = substr($track_info, strrpos($track_info, "到達(dá)") + );

echo "貨物從" . $start_location . "出發(fā)，到達(dá)" . $end_location;

```