Returns the YAML representation of a value

# yaml_emit

(PECL yaml >= 0.5.0)

yaml_emit — Returns the YAML representation of a value

### Description

yaml_emit(
mixed `$data`,
int `$encoding` = YAML_ANY_ENCODING,
int `$linebreak` = YAML_ANY_BREAK,
array `$callbacks` = `null`
): string

Generate a YAML representation of the provided `data`.

### Parameters

`data`

  The `data` being encoded. Can be any type except a resource.

`encoding`

  Output character encoding chosen from `YAML_ANY_ENCODING`, `YAML_UTF8_ENCODING`, `YAML_UTF16LE_ENCODING`, `YAML_UTF16BE_ENCODING`.

`linebreak`

  Output linebreak style chosen from `YAML_ANY_BREAK`, `YAML_CR_BREAK`, `YAML_LN_BREAK`, `YAML_CRLN_BREAK`.

`callbacks`

  Content handlers for emitting YAML nodes. Associative array of classname => callable mappings. See emit callbacks for more details.

### Return Values

Returns a YAML encoded string on success.

### Changelog

Version | Description
--- | ---
PECL yaml 1.1.0 | The `callbacks` parameter was added.

### Examples

Example #1 yaml_emit() example

`<?php
$addr = array(
"given" => "Chris",
"family"=> "Dumars",
"address"=> array(
"lines"=> "458 Walkman Dr.
Suite #292",
"city"=> "Royal Oak",
"state"=> "MI",
"postal"=> 48046,
),
);
$invoice = array (
"invoice"=> 34843,
"date"=> 980208000,
"bill-to"=> $addr,
"ship-to"=> $addr,
"product"=> array(
array(
"sku"=> "BL394D",
"quantity"=> 4,
"description"=> "Basketball",
"price"=> 450,
),
array(
"sku"=> "BL4438H",
"quantity"=> 1,
"description"=> "Super Hoop",
"price"=> 2392,
),
),
"tax"=> 251.42,
"total"=> 4443.52,
"comments"=> "Late afternoon is best. Backup contact is Nancy Billsmer @ 338-4338.",
);
var_dump(yaml_emit($invoice));
?>`

The above example will output something similar to:

    string(628) "---
    invoice: 34843
    date: 980208000
    bill-to:
      given: Chris
      family: Dumars
      address:
        lines: |-
          458 Walkman Dr.
                  Suite #292
        city: Royal Oak
        state: MI
        postal: 48046
    ship-to:
      given: Chris
      family: Dumars
      address:
        lines: |-
          458 Walkman Dr.
                  Suite #292
        city: Royal Oak
        state: MI
        postal: 48046
    product:
    - sku: BL394D
      quantity: 4
      description: Basketball
      price: 450
    - sku: BL4438H
      quantity: 1
      description: Super Hoop
      price: 2392
    tax: 251.420000
    total: 4443.520000
    comments: Late afternoon is best. Backup contact is Nancy Billsmer @ 338-4338.
    ...
    "

### See Also

- yaml_emit_file() - Send the YAML representation of a value to a file
- yaml_parse() - Parse a YAML stream

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