containsRE, containsCaseRE

Purpose: Looks whether a regular expression pattern is contained in a string. The pcre library is used for processing the regular expressions and the exact syntax and semantics is documented there. (1 2)

The containsCaseRE() function works very similar but is not case sensitive.

If the optional pos argument is given, it must be an integer denoting a character position in the string. Search then starts at this position.

Return Values: Returns true if and only if string contains the pattern.

Example 1:

input:	resulting output:
<? containsRE("Hello World","Hello")>	true
<? containsRE("Hello World","[a-c]")>	false
<? containsRE("Hello World","[d-f]")>	true
<? containsRE("Hello World","Hello",1)>	false

Example 2:

input:

<if containsCaseRE("One two three four five", "[[:space:][:punct:]]+[[:alpha:]]{4}[[:space:][:punct:]]+") > Four letter word found. < else > No four letter word found. < /if>

resulting output:

Four letter word found.

See Also: indexRE(), indexCaseRE(), substRE(), substallRE().