GET request is working, only POST request using CURL in cron job not executing

When dealing with curl requests to SSL enabled endpoints you'll have much greater success if the curl request includes options specifically geared towards ssl connections. The simple function below uses cacert.pem and other ssl specific options

function curl( $url=NULL, $options=NULL ){    $cacert='c:/wwwroot/cacert.pem';    $vbh = fopen('php://temp', 'w+');    $res=array(        'response'  =>  NULL,        'info'      =>  array( 'http_code' => 400 ),        'headers'   =>  NULL,        'errors'    =>  NULL    );    if( is_null( $url ) ) return (object)$res;    session_write_close();    /* Initialise curl request object */    $curl=curl_init();    if( parse_url( $url,PHP_URL_SCHEME )=='https' ){        curl_setopt( $curl, CURLOPT_SSL_VERIFYPEER, true );        curl_setopt( $curl, CURLOPT_SSL_VERIFYHOST, 2 );        curl_setopt( $curl, CURLOPT_CAINFO, $cacert );    }    /* Define standard options */    curl_setopt( $curl, CURLOPT_URL,trim( $url ) );    curl_setopt( $curl, CURLOPT_AUTOREFERER, true );    curl_setopt( $curl, CURLOPT_FOLLOWLOCATION, true );    curl_setopt( $curl, CURLOPT_FAILONERROR, true );    curl_setopt( $curl, CURLOPT_HEADER, false );    curl_setopt( $curl, CURLINFO_HEADER_OUT, false );    curl_setopt( $curl, CURLOPT_RETURNTRANSFER, true );    curl_setopt( $curl, CURLOPT_BINARYTRANSFER, true );    curl_setopt( $curl, CURLOPT_CONNECTTIMEOUT, 20 );    curl_setopt( $curl, CURLOPT_TIMEOUT, 60 );    curl_setopt( $curl, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36' );    curl_setopt( $curl, CURLOPT_MAXREDIRS, 10 );    curl_setopt( $curl, CURLOPT_ENCODING, '' );    curl_setopt( $curl, CURLOPT_VERBOSE, true );    curl_setopt( $curl, CURLOPT_NOPROGRESS, true );    curl_setopt( $curl, CURLOPT_STDERR, $vbh );    /* Assign runtime parameters as options */    if( isset( $options ) && is_array( $options ) ){        foreach( $options as $param => $value ) curl_setopt( $curl, $param, $value );    }    /* Execute the request and store responses */    $res=(object)array(        'response'  =>  curl_exec( $curl ),        'info'      =>  (object)curl_getinfo( $curl ),        'errors'    =>  curl_error( $curl )    );    rewind( $vbh );    $res->verbose=stream_get_contents( $vbh );    fclose( $vbh );    curl_close( $curl );    return $res;}/* configure the request */$data = array(    'email'     => 'peter@klaven',    'password'  => 'cityslicka');/* the target endpoint */$url='https://reqres.in/api/login';$config=array(    CURLOPT_POST        =>  true,    CURLOPT_POSTFIELDS  =>  json_encode( $data ),    CURLOPT_HTTPHEADER  =>  array('Content-Type: application/json'));/* make the request */$results=curl( $url, $config );if( $results->info->http_code==200 ){    printf('<pre>%s</pre>',print_r( $results, true ));}

Some info from the response object - notably verbose details ~ the full response includes the token ~ {"token":"QpwL5tke4Pnpja7X"} which suggests success!

* TCP_NODELAY set* Connected to reqres.in (104.27.134.11) port 443 (#0)* ALPN, offering http/1.1* successfully set certificate verify locations:  CAfile: c:/wwwroot/cacert.pem  CApath: none* SSL connection using TLSv1.2 / ECDHE-ECDSA-CHACHA20-POLY1305* ALPN, server accepted to use http/1.1* Server certificate:*  subject: OU=Domain Control Validated; OU=PositiveSSL Multi-Domain; CN=sni96286.cloudflaressl.com*  start date: Jan 23 00:00:00 2019 GMT*  expire date: Aug  1 23:59:59 2019 GMT*  subjectAltName: host "reqres.in" matched cert's "reqres.in"*  issuer: C=GB; ST=Greater Manchester; L=Salford; O=COMODO CA Limited; CN=COMODO ECC Domain Validation Secure Server CA 2*  SSL certificate verify ok.