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    substring-before


    The substring-before function returns a string that is the rest of a given string before a given substring.

    Syntax

    substring-before( haystack , needle )
    

    Arguments

    haystack
    The string to be evaluated. Part of this string will be returned.
    needle
    The substring to search for. Everything before the first occurance of needle in haystack will be returned.

    Returns

    A string.

    Examples

    XPath Example Output
    substring-before('aa-bb','-') aa
    substring-before('aa-bb','a') (empty string)
    substring-before('aa-bb','b') aa-
    substring-before('aa-bb','q') (empty string)

    Defined

    XPath 1.0 4.2

    Gecko support

    Supported.

    Document Tags and Contributors

    Contributors to this page: Dietrich, Docwhat, Sheppy, Jonnyq, Mgjbot, Ptak82
    Last updated by: Sheppy,