preg_match stops looking after the first match. preg_match_all, on the other hand, continues to look until it finishes processing the entire string. Once match is found, it uses the remainder of the string to try and apply another match. http://php.net/manual/en/function.preg-match-all.php
1. Use PHP’s inbuilt ctype_alnum You dont need to use a regex for this, PHP has an inbuilt function ctype_alnum which will do this for you, and execute faster: <?php $strings = array(‘AbCd1zyZ9’, ‘foo!#$bar’); foreach ($strings as $testcase) { if (ctype_alnum($testcase)) { echo “The string $testcase consists of all letters or digits.\n”; } else { … Read more
In this post I’ll provide you with three different methods of doing what you ask for. I actually recommend using the last snippet, since it’s easiest to comprehend as well as being quite neat in code. How do I see what elements in an array that matches my regular expression? There is a function dedicated … Read more
Add a \s? if a space can be allowed. \s stands for white space ? says the preceding character may occur once or not occur. If more than one spaces are allowed and is optional, use \s*. * says preceding character can occur zero or more times. ‘#<a href\s?=”https://stackoverflow.com/questions/14293024/(.*?)” title\s?=”https://stackoverflow.com/questions/14293024/(.*?)”><img alt\s?=”https://stackoverflow.com/questions/14293024/(.*?)” src\s?=”https://stackoverflow.com/questions/14293024/(.*?)”[\s*]width\s?=”150″[\s*]height\s?=”https://stackoverflow.com/questions/14293024/(.*?)”></a>#’ allows an optional … Read more
The problem is really old, but there are some new developments related to PHP 7.3 and newer versions that need to be covered. PHP PCRE engine migrates to PCRE2, and the PCRElibrary version used in PHP 7.3 is 10.32, and that is where Backward Incompatible Changes originate from: Internal library API has changed The ‘S’ … Read more
You can use preg_split as: $arr = preg_split(‘/(?=[A-Z])/’,$str); See it I’m basically splitting the input string just before the uppercase letter. The regex used (?=[A-Z]) matches the point just before a uppercase letter.
You need a delimiter for your pattern. It should be added at the start and end of the pattern like so: $pattern = “/My name is ‘(.*)’ and im fine/”; // With / as a delimeter
You just missed an extra pair of brackets for the “OR” symbol. The following should do the trick: ([0-9]+)\s+((\bseconds\b)|(\bminutes\b)) Without those you were either matching a number followed by seconds OR just the word minutes
There is no modifier g for preg_match. Instead, you have to use the preg_match_all function. So instead of: preg_match(“/^(\w|\.|-)+?@(\w|-)+?\.\w{2,4}($|\.\w{2,4})$/gim”, ….) use: preg_match_all(“/^(\w|\.|-)+?@(\w|-)+?\.\w{2,4}($|\.\w{2,4})$/im”, ….)
PHP regex strings need delimiters. Try: $numpattern=”/^([0-9]+)$/”; Also, note that you have a lower case o, not a zero. In addition, if you’re just validating, you don’t need the capturing group, and can simplify the regex to /^\d+$/. Example: http://ideone.com/Ec3zh See also: PHP – Delimiters