站長資訊網str_replace()的語法：
str_replace mixed $search ,mixed $replace, mixed $subject [, int &$count ] ) : mixed
1.search ,replace都是字符串
<?php $bodytag = str_replace("%body%", "black", "<body text='%body%'>"); echo $bodytag; //輸出：<body text='black'> ?>
2.search是數組 ,replace是字符串
<?php $vowels = array("a", "e", "i", "o", "u", "A", "E", "I", "O", "U"); $onlyconsonants = str_replace($vowels, "", "Hello World of PHP"); echo $onlyconsonants;// 輸出： Hll Wrld f PHP ?>
3.search ,replace都是數組
<?php $phrase = "You should eat fruits, vegetables, and fiber every day."; $healthy = array("fruits", "vegetables", "fiber"); $yummy = array("pizza", "beer", "ice cream"); $newphrase = str_replace($healthy, $yummy, $phrase); //輸出：You should eat pizza, beer, and ice cream every day ?>
4.含有第三個參數
<?php $str = str_replace("ll", "", "good golly miss molly!", $count); echo $count;// 賦值: 2 ?>
ps: search ,replace的第一組替換會影響到第二組，如下
$search = array('A', 'B', 'C', 'D', 'E'); $replace = array('B', 'C', 'D', 'E', 'F'); $subject = 'A'; echo str_replace($search, $replace, $subject)."<br/>"; // 輸出 F ，因為 A 被 B 替換，B 又被 C 替換，以此類推... // 由于從左到右依次替換，最終 E 被 F 替換
推薦：php視頻教程 php7教程
