strpos

$filename = 'my_upgrade(1).zip'; $match = 'my_upgrade'; if(!strpos($filename, $match)) { die(); } else { //proceed } In the code above, I'm trying to die out of the script when the filename does not contain the text string "my_upgrade". However, in the example given, it should not die since " my_upgrade(1).zip " contains the string " my_upgrade ". What am I missing? strpos returns false if the string is not found, and 0 if it is found at the beginning. Use the identity operator to distinguish the two: if (strpos($filename, $match) === false) { By the way, this fact is documented with a red

I am using the stripos function to check if a string is located inside another string, ignoring any cases. Here is the problem: stripos("ø", "Ø") returns false. While stripos("Ø", "Ø") returns true. As you might see, it looks like the function does NOT do a case- insensitive search in this case. The function has the same problems with characters like Ææ and Åå. These are Danish characters. Use mb_stripos() instead. It's character set aware and will handle multi-byte character sets. stripos() is a holdover from the good old days when there was only ASCII and all chars were only 1 byte. You need

I noticed a lot of developers are using both strstr and strpos to check for a substring existence. Is one of them preferred and why ? From the PHP online manual : If you only want to determine if a particular needle occurs within haystack, use the faster and less memory intensive function strpos() instead. Sk8erPeter Here are some other answers (+benchmarks) I got to my question, which is almost the same (I didn't realize yours when asking). In the meantime I also made my own benchmark test, which I ran 1000000 times for each relevant functions ( strstr() , strpos() , stristr() and stripos() )

How can I change the strpos to make it non case sensitive. The reason is if the product->name is MadBike and the search term is bike it will not echo me the link. My main concern is the speed of the code. <?php $xml = simplexml_load_file('test.xml'); $searchterm = "bike"; foreach ($xml->product as $product) { if (strpos($product->name, $searchterm) !== false ) { echo $product->link; } } ?> Dereleased You're looking for stripos() If that isn't available to you, then just call strtolower() on both strings first. EDIT : stripos() won't work if you want to find a substring with diacritical sign.

前段时间做了一个国外网站,本地时间格式与服务器时间格式不一样,相对应的程序也出错,自己split分割有的时候也会不对. 后来查了一下发现MS有个解决方案 <SCRIPT Runat=Server Language=VBScript> Sub SetLCID() Dim strAcceptLanguage Dim strLCID Dim strPos strAcceptLanguage = Request.ServerVariables("HTTP_ACCEPT_LANGUAGE") strPos = InStr(1, strAcceptLanguage, ",") If strPos > 0 Then strAcceptLanguage = Left(strAcceptLanguage, strPos - 1) End If 'strAcceptLanguage="zh-cn" 这个地方可以直接设置成中文格式就不会有错了 Select Case LCase(strAcceptLanguage) Case "af" strLCID = 1078 ' Afrikaans Case "sq" strLCID = 1052 ' Albanian Case "ar-sa" strLCID = 1025 ' Arabic(Saudi Arabia) Case "ar-iq" strLCID =

I'm trying to see if a file contains a string that is sent to the page. I'm not sure what is wrong with this code: ?php $valid = FALSE; $id = $_GET['id']; $file = './uuids.txt'; $handle = fopen($file, "r"); if ($handle) { // Read file line-by-line while (($buffer = fgets($handle)) !== false) { if (strpos($buffer, $id) === false) $valid = TRUE; } } fclose($handle); if($valid) { do stufff } Much simpler: <?php if( strpos(file_get_contents("./uuids.txt"),$_GET['id']) !== false) { // do stuff } ?> In response to comments on memory usage: <?php if( exec('grep '.escapeshellarg($_GET['id']).' ./uuids