PHP如何去掉指定字元?

2020-07-16 10:06:27

PHP如何去掉指定字元?

在PHP中可以使用「str_replace()」函數去掉指定字元,該函數會將子字串進行替換,其語法是「str_replace(sea,rep,sub) 」,使用時只需呼叫該函數將指定字元替換為空即可。

程式碼範例

基本範例

<?php
// 賦值: <body text='black'>
$bodytag = str_replace("%body%", "black", "<body text='%body%'>");
// 賦值: Hll Wrld f PHP
$vowels = array("a", "e", "i", "o", "u", "A", "E", "I", "O", "U");
$onlyconsonants = str_replace($vowels, "", "Hello World of PHP");
// 賦值: You should eat pizza, beer, and ice cream every day
$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);
// 賦值: 2
$str = str_replace("ll", "", "good golly miss molly!", $count);
echo $count;
?>

替換範例

<?php
// 替換順序
$str     = "Line 1nLine 2rLine 3rnLine 4n";
$order   = array("rn", "n", "r");
$replace = '<br />';
// 首先替換 rn 字元,因此它們不會被兩次轉換
$newstr = str_replace($order, $replace, $str);
// 輸出 F ,因為 A 被 B 替換,B 又被 C 替換,以此類推...
// 由於從左到右依次替換,最終 E 被 F 替換
$search  = array('A', 'B', 'C', 'D', 'E');
$replace = array('B', 'C', 'D', 'E', 'F');
$subject = 'A';
echo str_replace($search, $replace, $subject);
// 輸出: apearpearle pear
// 由於上面提到的原因
$letters = array('a', 'p');
$fruit   = array('apple', 'pear');
$text    = 'a p';
$output  = str_replace($letters, $fruit, $text);
echo $output;
?>
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