This should work for you: <?php $string = “test1 test1 test2 test2 test2 test1 test1 test2”; echo $string . “<br />”; echo $string = strtr($string, array(“test1” => “test2”, “test2” => “test1”)); ?> Output: test1 test1 test2 test2 test2 test1 test1 test2 test2 test2 test1 test1 test1 test2 test2 test1 Checkout this DEMO: http://codepad.org/b0dB95X5
Try this (?<!href=”)(\b[\w]+:\/\/[\w-?&;#~=\.\/\@]+[\w\/]) See it here on Regexr To make it more general you can simplify your lookbehind to check only for “=”” (?<!=”)(\b[\w]+:\/\/[\w-?&;#~=\.\/\@]+[\w\/]) See it on Regexr (?<!href=”https://stackoverflow.com/questions/9567836/) is a negative lookbehind assertion, it ensures that there is no”href=”” before your pattern. \b is a word boundary that anchors the start of your link … Read more
The + operator (quantifier) matches multiple instances of the last character (, character class or capture group or back-reference). $string = preg_replace(‘/_+/’, ‘_’, $string); This would replace one or more underscores with a single underscore. Technically more correct to the title of the question then is to only replace two or more: $string = preg_replace(‘/__+/’, … Read more
A convenient (although not record-breaking in performance) solution using regular expressions would be: $string = “3rd time’s a charm”; $filteredNumbers = array_filter(preg_split(“/\D+/”, $string)); $firstOccurence = reset($filteredNumbers); echo $firstOccurence; // 3 Assuming that there is at least one number in the input, this is going to print the first one. Non-digit characters will be completely ignored … Read more
You are using forward-slashes as your regex pattern delimeter, so /<title>(.*)</title>/Ui’ will not work (</title> has a forward slash). You should be able to escape the forward slash or use a different delimiter that is not contained within the pattern, for example ‘/<title>(.*)<\/title>/Ui’ //(esacaping) or ‘~<title>(.*)</title>~Ui’ //different delimiter
Here is an UTF-8 safe solution, which not only works with properly formatted documents, but also with document fragments. The mb_convert_encoding is needed, because loadHtml() seems to has a bug with UTF-8 encoding (see here and here). The mb_substr is trimming the body tag from the output, this way you get back your original content … Read more
Try to begin and end your regular expression with different sign than / I personally use ` I’ve seen people using # I think most chars are good. You can read more about it here: http://pl.php.net/manual/en/regexp.reference.delimiters.php Like this: preg_match(‘#time/emit#’, $subject); // instead of /time/emit/ To put it another way: Your $find variable should contain rather … Read more
A backslash character (\) is considered to be an escape character by both PHP’s parser and the regular expression engine (PCRE). If you write a single backslash character, it will be considered as an escape character by PHP parser. If you write two backslashes, it will be interpreted as a literal backslash by PHP’s parser. … Read more
You can use an anonymous function to pass the matches to your function: $result = preg_replace_callback( “/\{([<>])([a-zA-Z0-9_]*)(\?{0,1})([a-zA-Z0-9_]*)\}(.*)\{\\1\/\\2\}/isU”, function($m) { return CallFunction($m[1], $m[2], $m[3], $m[4], $m[5]); }, $result ); Apart from being faster, this will also properly handle double quotes in your string. Your current code using /e would convert a double quote ” into \”.
First, I’d like to point out that new lines can be either \r, \n, or \r\n depending on the operating system. My solution: echo preg_replace(‘/[ \t]+/’, ‘ ‘, preg_replace(‘/[\r\n]+/’, “\n”, $string)); Which could be separated into 2 lines if necessary: $string = preg_replace(‘/[\r\n]+/’, “\n”, $string); echo preg_replace(‘/[ \t]+/’, ‘ ‘, $string); Update: An even better … Read more