How to Using Qualifier In PHP ...Learn@FU-VISION

Quantifiers
The frequency or position of bracketed character sequences and single characters can be denoted by a special character. Each special character having a specific connotation. The +, *, ?, {int. range}, and $ flags all follow a character sequence.
Sr.No Expression & Description
1 p+
It matches any string containing at least one p.
2 p*
It matches any string containing zero or more p's.
3 p?
It matches any string containing zero or more p's. This is just an alternative way to use p*.
4 p{N}
It matches any string containing a sequence of N p's
5 p{2,3}
It matches any string containing a sequence of two or three p's.
6 p{2, }
It matches any string containing a sequence of at least two p's.
7 p$
It matches any string with p at the end of it.

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