Given a string and regex, how can I make sure it matches the entire string? That is, I don't want a newline to trigger the end of the match - I want it to match to the very end of the string.
Example:
<?php
// simplified date pattern
$pattern = "/^[0-9]{4}\-[0-9]{2}\-[0-9]{2}$/";
$d = "2014-01-05\n"; // OOPS - this will match
if(preg_match($pattern, $d)) {
echo "This is a date string.";
}
Use the D
modifier :
D (PCRE_DOLLAR_ENDONLY)
If this modifier is set, a dollar metacharacter in the pattern matches only at the end of the subject string. Without this modifier, a dollar also matches immediately before the final character if it is a newline (but not before any other newlines).
$pattern = "/^[0-9]{4}\-[0-9]{2}\-[0-9]{2}$/D";
您将需要像这样使用多行模式修饰符m
:
$pattern = "/^[0-9]{4}\-[0-9]{2}\-[0-9]{2}$/m"; // note m at end after pattern
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