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PHP Alphanumeric Regular Expression


PHP Alphanumeric Regular Expression

By : connor
Date : November 22 2020, 01:01 AM
I hope this helps you .
Regex to accept all alphanumeric characters, and the symbols @.+-.
code :
^[\p{L}\p{N}@+.-]+$
if (!preg_match("~^[\p{L}\p{N}@+._-]+$~u", $email)) {


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Regular expression for allowing a user to enter alphanumeric characters and only one non-alphanumeric character

Regular expression for allowing a user to enter alphanumeric characters and only one non-alphanumeric character


By : Александр Староверов
Date : March 29 2020, 07:55 AM
it helps some times Something like that? (Add anchors if necessary - not sure about how the validators apply the regex)
code :
\w*(\W\w*)?
Regular Expression to match alphanumeric, non alphanumeric and spaces

Regular Expression to match alphanumeric, non alphanumeric and spaces


By : jwolin
Date : March 29 2020, 07:55 AM
wish of those help Not sure I understand well your needs, but is this regex work for you?
code :
$str =~  /\w+\s[\w-]+\s\d+\.\d+/;
Regular expression for pattern for [Alphanumeric]_[Alphanumeric]_[Numbers]

Regular expression for pattern for [Alphanumeric]_[Alphanumeric]_[Numbers]


By : laland
Date : March 29 2020, 07:55 AM
I wish this help you You could try the below regex to match strings which are in this Alphanumeric_Alphanumeric_Numbers format,
code :
[A-Za-z0-9]+_[A-Za-z0-9]+_\d+
regular expression not between alphanumeric

regular expression not between alphanumeric


By : Luisa Andrino
Date : March 29 2020, 07:55 AM
it helps some times I would like to identify the string "mystring" in a text (actually a R code), but ensuring that it is a variable name: , Just use the \b (word boundary) token:
code :
\\bmystring\\b
pattern = "\\bmystring\\b"
`==`(grepl(pattern = pattern, 
                x = c("thisismystring","mystringisnice","\nmystring", "mystring", "mystring=", "mystring(", " mystring","mystring\n", "6mystring", "mystring0", "= mystring(", "=mystring", 
                      "hop
                      mystring")),
          c(FALSE,          FALSE,           TRUE,         TRUE,        TRUE,        TRUE,         TRUE,       TRUE,        FALSE, FALSE,       TRUE,          TRUE,    TRUE))
# [1] TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE
Regular Expression advice for [Alphanumeric][alphanumeric.-_@] 31 characters

Regular Expression advice for [Alphanumeric][alphanumeric.-_@] 31 characters


By : Sagiv Some
Date : March 29 2020, 07:55 AM
hope this fix your issue I'm looking to do a name check using regex in javascript. , You are quite close, here is the corrected regex:
code :
/^[a-z0-9][\w@.-]{0,30}$/i
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