php - Array 2 string conversion while using CURLOPT_POSTFIELDS

Solution:

j11e's answer won't work if you want to send multidimensional arrays

Try this recursive function.

https://gist.github.com/yisraeldov/ec29d520062575c204be7ab71d3ecd2f

<?php
function build_post_fields( $data,$existingKeys='',&$returnArray=[]){
    if(($data instanceof CURLFile) or !(is_array($data) or is_object($data))){
        $returnArray[$existingKeys]=$data;
        return $returnArray;
    }
    else{
        foreach ($data as $key => $item) {
            build_post_fields($item,$existingKeys?$existingKeys."[$key]":$key,$returnArray);
        }
        return $returnArray;
    }
}
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And you can use it like this.

curl_setopt($ch, CURLOPT_POSTFIELDS, build_post_fields($postfields));
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Solution:

Using Laravel one thing that worked for me was to use the tag 'Content-Type: application/json' in the request header, and sending my data json encoded like this:

curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type: application/json', 'Accept: application/json'));
curl_setopt($ch, CURLOPT_POST, 1); 
curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($data));
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In the function that receives the parameters in the request I had no need to use the json decode function, I access to the parameters just like

$request->something

Solution:

After research for an hour, here the way i fixed my code:

$strVar = '';
if ($data) {
        $ea = build_post_fields($data);
        foreach($ea as $key=>$val) {
                $strVar.= "$key=$val&";
        }
}


/* eCurl */
$curl = curl_init($url);

/* Set Array data to POST */
curl_setopt( $curl, CURLOPT_POSTFIELDS, ($strVar) );

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And here is the function I take from @Yisrael Dov below:

function build_post_fields( $data, $existingKeys='', $returnArray=[]){
    if(($data instanceof CURLFile) or !(is_array($data) or is_object($data))){
        $returnArray[$existingKeys]=$data;
        return $returnArray;
    }
    else{
        foreach ($data as $key => $item) {
            build_post_fields($item,$existingKeys?$existingKeys."[$key]":$key,$returnArray);
        }
        return $returnArray;
    }
}
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That work perfectly! You can post a deep array like:

$post_var = array(
'people' => array('Lam', 'Hien', 'Nhi'),
'age' => array(12, 22, 25)
);
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Good day!