Use PHP functions in JavaScript

JavaScript strripos

Finds position of last occurrence of a string within another string

function strripos (haystack, needle, offset) {
    // Finds position of last occurrence of a string within another string  
    // 
    // version: 1001.2911
    // discuss at: http://phpjs.org/functions/strripos    // +   original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   bugfixed by: Onno Marsman
    // +   input by: saulius
    // +   bugfixed by: Brett Zamir (http://brett-zamir.me)
    // *     example 1: strripos('Kevin van Zonneveld', 'E');    // *     returns 1: 16
        haystack = (haystack+'').toLowerCase();
        needle = (needle+'').toLowerCase();
        
        var i = -1;    if (offset) {
        i = (haystack+'').slice(offset).lastIndexOf(needle); // strrpos' offset indicates starting point of range till end,
        // while lastIndexOf's optional 2nd argument indicates ending point of range from the beginning
        if (i !== -1) {
            i += offset;        }
    }
    else {
        i = (haystack+'').lastIndexOf(needle);
    }    return i >= 0 ? i : false;
}

external links: original PHP docs | raw js source

Examples

Running

1	strripos('Kevin van Zonneveld', 'E');

Should return

Dependencies

No dependencies, you can use this function standalone.

Open syntax issues

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