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This is used to count the number of sentences in a variable.计算变量里句子的数量。
Example 5-6. count_sentences
index.php: $smarty = new Smarty; $smarty->assign('articleTitle', 'Two Soviet Ships Collide - One Dies. Enraged Cow Injures Farmer with Axe.'); $smarty->display('index.tpl'); index.tpl: {$articleTitle} {$articleTitle|count_sentences} OUTPUT: Two Soviet Ships Collide - One Dies. Enraged Cow Injures Farmer with Axe. 2