---
layout: page
title: "JavaScript fpassthru function"
comments: true
sharing: true
footer: true
alias:
- /functions/view/fpassthru:804
- /functions/view/fpassthru
- /functions/view/804
- /functions/fpassthru:804
- /functions/804
---
<!-- Generated by Rakefile:build -->
A JavaScript equivalent of PHP's fpassthru

{% codeblock filesystem/fpassthru.js lang:js https://raw.github.com/kvz/phpjs/master/functions/filesystem/fpassthru.js raw on github %}
function fpassthru (handle) {
  // http://kevin.vanzonneveld.net
  // +   original by: Brett Zamir (http://brett-zamir.me)
  // *     example 1: fopen('http://kevin.vanzonneveld.net/pj_test_supportfile_1.htm', 'r');
  // *     example 1: fpassthru(handle);
  // *     returns 1: 3

  if (!this.php_js || !this.php_js.resourceData || !this.php_js.resourceDataPointer || !handle || !handle.id) {
    return false;
  }

  var chrs = this.php_js.resourceData[handle.id].slice(this.php_js.resourceDataPointer[handle.id]);
  this.echo(chrs);
  this.php_js.resourceDataPointer[handle.id] = this.php_js.resourceData[handle.id].length; // Place pointer at end
  return chrs;
}
{% endcodeblock %}

 - [view on github](https://github.com/kvz/phpjs/blob/master/functions/filesystem/fpassthru.js)
 - [edit on github](https://github.com/kvz/phpjs/edit/master/functions/filesystem/fpassthru.js)

### Example 1
This code
{% codeblock lang:js example %}
fopen('http://kevin.vanzonneveld.net/pj_test_supportfile_1.htm', 'r');
fpassthru(handle);
{% endcodeblock %}

Should return
{% codeblock lang:js returns %}
3
{% endcodeblock %}


### Other PHP functions in the filesystem extension
{% render_partial _includes/custom/filesystem.html %}