Regex for php, check if a variable has 1 uppercase, 1 small, 1 digit and 8 characters minimum

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Regex for php, check if a variable has 1 uppercase, 1 small, 1 digit and 8 characters minimum

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I have a project in php, I am quite new programming and I never touch that language, my question is basically what the title says, I need to see if a variable has 1 uppercase, 1 lowercase, 1 digit and 8 characters minimum I currently have this if

if(!preg_match('^(?=\w*\d)(?=\w*[A-Z])(?=\w*[a-z])\S{8,}$', $password)){
    /*
     *
     */
}

Warning: preg_match (): No ending delimiter '^' found in C: ... gives me this error

I guess that regular expression is not good for php, and I'm not finding the right way to do it

First I check in HTML 'pattern'=>'^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)[a-zA-Z\d]{8,}$'

HTML control works fine, but I want to do it in Backend too.

Thank you.

php regex symfony

asked by Javier Heisecke 12.07.2018 в 18:01

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1 answer

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score 0 · Accepted Answer

Apparently you are not using delimiters for your regex, that is, you must enclose your regex expression with / or # or ~ , etc.

When the PCRE functions are used, the pattern is required is delimited by delimiters. A delimiter can be any non-alphanumeric character, no backslash, or blank space.

Your code should look like this:

if(!preg_match('/^(?=\w*\d)(?=\w*[A-Z])(?=\w*[a-z])\S{8,}$/', $password)){
    /*
     *
     */
}

You can read more about Delimiters in PHP