28 lines
1.0 KiB
Markdown
28 lines
1.0 KiB
Markdown
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# Civetweb API Reference
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### `mg_printf( conn, fmt, ... );`
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### Parameters
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| Parameter | Type | Description |
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| :--- | :--- | :--- |
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|**`conn`**|`struct mg_connection *`|The connection over which the data must be sent|
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|**`fmt`**|`const char *`|Format string|
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|**`...`**|*various*|Parameters as specified in the format string|
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### Return Value
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| Type | Description |
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| :--- | :--- |
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|`int`|Number of bytes written or an error code|
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### Description
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The function `mg_printf()` can be used to send formatted strings over a connection. The functionality is comparable to the `printf()` family of functions in the standard C library. The function returns **0** when the connection has been closed, **-1** if an error occurred and otherwise the number of bytes written over the connection. Except for the formatting part, the `mg_printf()` function is identical to the function [`mg_write()`](mg_write.md).
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### See Also
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* [`mg_websocket_client_write();`](mg_websocket_client_write.md)
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* [`mg_websocket_write();`](mg_websocket_write.md)
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* [`mg_write();`](mg_write.md)
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