php str_replace()函数的用法，有那些参数？
3 回答
凤凰求蛊
TA贡献1825条经验 获得超4个赞
str_replace
(PHP 4, PHP 5)
str_replace — Replace all occurrences of the search string with the replacement string
说明
mixed str_replace ( mixed $search, mixed $replace, mixed $subject [, int &$count] )
This function returns a string or an array with all occurrences of search in subject replaced with the given replace value.
If you don't need fancy replacing rules (like regular expressions), you should always use this function instead of ereg_replace() or preg_replace().
参数
If search and replace are arrays, then str_replace() takes a value from each array and uses them to do search and replace on subject. If replace has fewer values than search, then an empty string is used for the rest of replacement values. If search is an array and replace is a string, then this replacement string is used for every value of search. The converse would not make sense, though.
If search or replace are arrays, their elements are processed first to last.
search
replace
subject
If subject is an array, then the search and replace is performed with every entry of subject, and the return value is an array as well.
count
注意: If passed, this will hold the number of matched and replaced needles.
返回值
This function returns a string or an array with the replaced values.
拉莫斯之舞
TA贡献1820条经验 获得超10个赞
范例
例 2329. str_replace() examples
<?php
// Provides: <body text='black'>
$bodytag = str_replace("%body%", "black", "<body text='%body%'>");
// Provides: Hll Wrld f PHP
$vowels = array("a", "e", "i", "o", "u", "A", "E", "I", "O", "U");
$onlyconsonants = str_replace($vowels, "", "Hello World of PHP");
// Provides: 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);
// Use of the count parameter is available as of PHP 5.0.0
$str = str_replace("ll", "", "good golly miss molly!", $count);
echo $count; // 2
// Order of replacement
$str = "Line 1\nLine 2\rLine 3\r\nLine 4\n";
$order = array("\r\n", "\n", "\r");
$replace = '<br />';
// Processes \r\n's first so they aren't converted twice.
$newstr = str_replace($order, $replace, $str);
// Outputs: apearpearle pear
$letters = array('a', 'p');
$fruit = array('apple', 'pear');
$text = 'a p';
$output = str_replace($letters, $fruit, $text);
echo $output;
?>
qq_花开花谢_0
TA贡献1835条经验 获得超7个赞
mixed str_replace ( mixed $search , mixed $replace , mixed $subject [, int &$count ] )
这个是函数原型！自己看吧，应该能看懂~
添加回答
举报
0/150
提交
取消