2018年4月29日 — Read offline. Join the Partner Program and earn for your writing. Try for $5/month. PHP · Regular Expressions · Pcre · Back End Development. 1.
Using double-quoted strings, the interaction between PHP's and PCRE's interpretations of which bits of the string are escape sequences can get messy. Regular ...
A regular expression is a pattern that is matched against a subject string from left to right. Most characters stand for themselves in a pattern, and match the ...
2009年2月27日 — Searches subject for a match to the regular expression given in pattern . Parameters ¶. pattern. The pattern to search for, as a string. subject.
Syntax. In PHP, regular expressions are strings composed of delimiters, a pattern and optional modifiers. $exp = /w3schools/i;. In the example above, / is the ...