Use PHP functions in JavaScript

JavaScript ftell

Get file pointer's read/write position

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function ftell (handle) {
    // Get file pointer's read/write position  
    // 
    // version: 909.322
    // discuss at: http://phpjs.org/functions/ftell    // +   original by: Brett Zamir (http://brett-zamir.me)
    // *     example 1: var h = fopen('http://kevin.vanzonneveld.net/pj_test_supportfile_1.htm', 'r');
    // *     example 1: fread(h, 100);
    // *     example 1: ftell(h);
    // *     returns 1: 99 
    var getFuncName = function (fn) {
        var name = (/\W*function\s+([\w\$]+)\s*\(/).exec(fn);
        if (!name) {
            return '(Anonymous)';        }
        return name[1];
    };
    if (!this.php_js || !this.php_js.resourceData || !this.php_js.resourceDataPointer ||
            !handle || !handle.constructor || getFuncName(handle.constructor) !== 'PHPJS_Resource') {        return false;
    }
    return this.php_js.resourceDataPointer[handle.id]*2-1; // We're currently storing by character, so need to multiply by two; subtract one to appear like array pointer
}
external links: original PHP docs | raw js source

Examples

Running

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var h = fopen('http://kevin.vanzonneveld.net/pj_test_supportfile_1.htm', 'r');
fread(h, 100);
ftell(h);

Should return

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99

Dependencies

No dependencies, you can use this function standalone.

Open syntax issues

php.js uses JsLint to help us keep our code consistent and prevent some common bugs.

Eventually we want all code to pass or at least take into consideration most fixes suggested by JsLint, following this JsLint configuration we’ve decided on.


Authors

Thanks to the following developers, you get to have ftell goodness in JavaScript.

Comments

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fopen
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fread
fseek
» ftell
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popen
readfile
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