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POPhp Curl add string file as a post field
 

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    <p>I am using mailGun web API and ran into the issue of adding inline files. Our software creates an image and passes it around as a string. I want to inline that image The problem that I have is that php curl takes in a file pointer, and not an actual file. I want to avoid writing a tmp file if possible as we have many process that work on the server and would not want to send a bad email </p> <p>Thanks in advance</p> <p>MailGun inline Sample:<a href="http://documentation.mailgun.net/user_manual.html#inline-image" rel="nofollow">http://documentation.mailgun.net/user_manual.html#inline-image</a> Code sample that I am using:</p> <pre><code>function send_inline_image($image) { $ch = curl_init(); curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_BASIC); curl_setopt($ch, CURLOPT_USERPWD, 'api:key-3ax6xnjp29jd6fds4gc373sgvjxteol0'); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'POST'); curl_setopt($ch, CURLOPT_URL, 'https://api.mailgun.net/v2/samples.mailgun.org/messages'); curl_setopt($ch, CURLOPT_POSTFIELDS, array('from' =&gt; 'Excited User &lt;me@samples.mailgun.org&gt;', 'to' =&gt; 'sergeyo@profista.com', 'subject' =&gt; 'Hello', 'text' =&gt; 'Testing some Mailgun awesomness!', 'html' =&gt; '&lt;html&gt;Inline image: &lt;img src="cid:test.jpg"&gt;&lt;/html&gt;', 'inline' =&gt; $image)) $result = curl_exec($ch); curl_close($ch); return $result; } $image = 'Some image string that we have generated' send_inline_image($image) </code></pre>
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    1. COI know nothing about php/mailgun and something about email construction. Are you able to produce and email with the above code that "doesn't" work, or are you simply looking for a way to call php curl code with a string instead of a file? If it's the former, check the email's source file against the examples in [rfc2183](http://www.ietf.org/rfc/rfc2183.txt), in section 3. Either way, what format is your image string in? For example, is it base64 encoded, or do you expect mailgun to encode it?
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    2. COA little more explanation is that I am switching from our current SMPT servers to mailGun. We use an old version of phpmailer to send the files which do base64 encode. So I have the raw and the base64 version. Also its a PNG file and the above code sample is what I am trying to execute.
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    3. COWhat errors are you receiving? According to several stackoverflow questions, php curl can handle multiple input forms for data eg. [CURL PHP send image](http://stackoverflow.com/questions/3433542/curl-php-send-image). You could skip the array technique and build the complete urlencoded string as in the manual like `param1=val1&param2=val2&...`. If that doesn't work, maybe mailgun's api only likes inline= images posted to them a special way. You could send a working example to a webserver that just echos the input back to you so you could learn to mimic that format.
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