PHP ActiveX Requires Chilkat v11.5.0+

curl with Variable Substitution in a GraphQL Request Body

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This example shows how to use variables inside a graphql request body using the {{variable_name}} syntax. When the HTTP request’s Content-Type indicates graphql, Chilkat automatically applies proper escaping to each substituted value, ensuring the resulting graphql remains valid. PHP ActiveX

<?php

$success = 0;

$success = 0;

//  Variable names are enclosed between {{ and }}
//  Important: Variables should be placed inside the quotes.

//  curl -X POST https://api.example.com/graphql \
//    -H "Content-Type: application/graphql; charset=utf-8" \
//    -H "Accept: application/json" \
//    --data-binary "mutation {
//    createUser(
//      input: {
//        name: \"{{name}}\"
//        city: \"{{city}}\"
//        note: \"{{note}}\"
//        bio: \"{{bio}}\"
//      }
//    ) {
//      id
//      name
//    }
//  }"

//  Build the above curl command.
$sbCurl = new COM("Chilkat.StringBuilder");
$sbCurl->AppendLn('curl -X POST https://api.example.com/graphql \\');
$sbCurl->AppendLn('  -H \'Content-Type: application/graphql; charset=utf-8\' \\');
$sbCurl->AppendLn('  -H \'Accept: application/json\' \\');
$sbCurl->AppendLn('  -d \'mutation {');
$sbCurl->AppendLn('  createUser(');
$sbCurl->AppendLn('    input: {');
$sbCurl->AppendLn('      name: \\\'{{name}}\\\'');
$sbCurl->AppendLn('      city: \\\'{{city}}\\\'');
$sbCurl->AppendLn('      note: \\\'{{note}}\\\'');
$sbCurl->AppendLn('      bio: \\\'{{bio}}\\\'');
$sbCurl->AppendLn('    }');
$sbCurl->AppendLn('  ) {');
$sbCurl->AppendLn('    id');
$sbCurl->AppendLn('    name');
$sbCurl->AppendLn('  }');
$sbCurl->AppendLn('}\'');

$curl = new COM("Chilkat.HttpCurl");

//  Provide values for variables
$curl->SetVar('name','José O'Connor');
$curl->SetVar('city','München');
$curl->SetVar('note','He said \'Hello, world!\' — and left…');
$curl->SetVar('bio','Loves sushi, café visits, and π ≈ 3.14159');

//  To demonstrate how the variables are replaced, this example does not execute the curl command. 
//  Instead, it generates the raw HTTP request that would be sent if the curl command were run.
$sbRawRequest = new COM("Chilkat.StringBuilder");
$success = $curl->ToRawRequest($sbCurl->getAsString(),$sbRawRequest);
if ($success == 0) {
    print $curl->LastErrorText . "\n";
    exit;
}

print $sbRawRequest->getAsString() . "\n";

//  The output is shown below.
//  Notice the quote chars around "Hello, world!" are properly escaped.

//  POST /graphql HTTP/1.1
//  Accept: application/json
//  Host: api.example.com
//  Content-Type: application/graphql; charset=utf-8
//  Content-Length: 250
//  
//  mutation {
//    createUser(
//      input: {
//        name: "José O'Connor"
//        city: "München"
//        note: "He said \"Hello, world!\" — and left…"
//        bio: "Loves sushi, café visits, and π ≈ 3.14159"
//      }
//    ) {
//      id
//      name
//    }
//  }

?>