php 如何使 strpos 不区分大小写
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How to make strpos case insensitive
提问by EnexoOnoma
How can I change the strpos to make it non case sensitive. The reason is if the product->nameis MadBikeand the search term is bikeit will not echo me the link.
My main concern is the speed of the code.
如何更改 strpos 以使其不区分大小写。原因是如果product->name是MadBike并且搜索词是自行车，它不会回显链接。我主要关心的是代码的速度。
<?php
$xml = simplexml_load_file('test.xml');
$searchterm = "bike";
foreach ($xml->product as $product) {
if (strpos($product->name, $searchterm) !== false ) {
echo $product->link;
} }
?>
回答by Dereleased
You're looking for stripos()
您正在寻找 stripos()
If that isn't available to you, then just call strtolower()on both strings first.
如果这对您不可用，那么只需先调用strtolower()两个字符串。
EDIT:
编辑：
stripos()won't work if you want to find a substring with diacritical sign.
stripos()如果您想找到带有变音符号的子字符串，则不起作用。
For example:
例如：
stripos("Le?y Jerzy na wie?y i nie wierzy, ?e na wie?y le?y du?o JE?Y","je?y");returns false, but it should return int(68).
stripos("Le?y Jerzy na wie?y i nie wierzy, ?e na wie?y le?y du?o JE?Y","je?y");返回false，但它应该返回int(68)。
回答by Turnsole
http://www.php.net/manual/en/function.stripos.php
http://www.php.net/manual/en/function.stripos.php
stripos() is not case-sensitive.
stripos() 不区分大小写。
回答by KDawg
'i'in stripos()means case insensitive
的“i”在stripos函数（）是指不区分大小写
if(stripos($product->name, $searchterm) !== false){ //'i' case insensitive
echo "Match = ".$product->link."<br />;
}
回答by user1483887
make both name & $searchterm lowercase prior to $strpos.
在 $strpos 之前将 name 和 $searchterm 设为小写。
$haystack = strtolower($product->name);
$needle = strtolower($searchterm);
if(strpos($haystack, $needle) !== false){
echo "Match = ".$product->link."<br />;
}
