Which method is preferred strstr or strpos?
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.
strpos
How to make strpos case insensitive
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. For example: stripos(“Leży Jerzy na wieży i nie wierzy, że na wieży leży dużo JEŻY”,”jeży”); returns false, but it should return int(68).
PHP check if file contains a string
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.txt’)) { // do stuff } ?>
php 5 strpos() difference between returning 0 and false?
Yes, this is correct / expected behavior : strpos can return 0 when there is a match at the beginning of the string and it will return false when there is no match The thing is you should not use == to compare 0 and false ; you should use ===, like this : if(strpos(“abcdefghijklmnop”,”http://www.”) … Read more
Simple PHP strpos function not working, why?
When in doubt, read the docs: [strpos] Returns the numeric position of the first occurrence of needle in the haystack string. So you want to try something more like: // … if (strpos($link, $unacceptable) !== false) { Because otherwise strpos is returning a number, and you’re looking for a boolean true.
Using an array as needles in strpos
@Dave an updated snippet from http://www.php.net/manual/en/function.strpos.php#107351 function strposa($haystack, $needles=array(), $offset=0) { $chr = array(); foreach($needles as $needle) { $res = strpos($haystack, $needle, $offset); if ($res !== false) $chr[$needle] = $res; } if(empty($chr)) return false; return min($chr); } How to use: $string = ‘Whis string contains word “cheese” and “tea”.’; $array = array(‘burger’, ‘melon’, ‘cheese’, ‘milk’); … Read more
Warning: strpos(): Empty needle in /XXX/post.php on line XXXX
The easiest way to solve this is to put a “guard clause” in. Something like this: function is_local_attachment($url) { $homeUrl = home_url(); if (empty($home_url)) { return; } . . . I don’t know what home_url() returns but obviously it can return an empty string and that is causing you a probelm. If you are using … Read more
How do search array values and remove them based on a condition or string? [closed]
You can do this with array_filter