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42 lines
1.1 KiB
PHTML
42 lines
1.1 KiB
PHTML
5 years ago
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<?php
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/**
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* Build custom post fields for safe multipart POST request for php before 5.5.
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* @param $fields array of key -> value fields to post.
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* @return $boundary and encoded post fields.
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*/
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function buildCustomPostFields($fields) {
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// invalid characters for "name" and "filename"
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static $disallow = array("\0", "\"", "\r", "\n");
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// initialize body
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$body = array();
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// build normal parameters
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foreach ($fields as $key => $value) {
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$key = str_replace($disallow, "_", $key);
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$body[] = implode("\r\n", array(
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"Content-Disposition: form-data; name=\"{$key}\"",
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'',
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filter_var($value),
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));
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}
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// generate safe boundary
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do {
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$boundary = "---------------------" . md5(mt_rand() . microtime());
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} while (preg_grep("/{$boundary}/", $body));
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// add boundary for each parameters
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foreach ($body as &$part) {
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$part = "--{$boundary}\r\n{$part}";
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}
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unset($part);
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// add final boundary
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$body[] = "--{$boundary}--";
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$body[] = '';
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return array($boundary, implode("\r\n", $body));
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}
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