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WordPress

Services_JSON::encodeUnsafe( mixed $var ): mixed

Source
wp-includes/class-json.php:310
encodes an arbitrary variable into JSON format without JSON Header - warning - may allow XSS!!!!)

Compatibility

Deprecated in WordPress 5.3.0. Use the PHP native JSON extension instead.

WordPress
core
PHP
7.4–8.6-dev
  • 6.7.7
  • 6.8.8
  • 6.9.7
  • 7.0.4
  • 7.1.0

Present in every tracked release (6.7.7 to 7.1.0), and compiles on PHP 7.4 through 8.6-dev.

Parameters

$varmixed
any number, boolean, string, array, or object to be encoded.
see argument 1 to Services_JSON() above for array-parsing behavior.
if var is a string, note that encode() always expects it to be in ASCII or UTF-8 format!

Return value

mixed
JSON string representation of input var or an error if a problem occurs

Performance profile

How much work a call to Services_JSON::encodeUnsafe() does, and what it touches: the algorithmic scaling, the Zend instruction count per call across PHP versions, the hooks it hands control to, and the core code that calls it. Measured from the compiled opcodes, not a stopwatch, so every number is identical on any machine running the same PHP version, and every function in core is ranked by cost.

Cost class
Trivial

Touches nothing outside its own arguments.

Scaling
Constant

No loop in the body: the same number of instructions runs whatever you pass in.

Instructions
24

Executed per call on PHP 8.5. The body compiles to 24.

Plugin surface
None

Nothing here hands control to plugin code.

Called by
1

1 place in core call this, so the cost is paid more often than your own code shows.

What it touches

  • hookthird-party callbacksdo_action()one call below Services_JSON::encodeUnsafe()

Further down the call graph this can also reach query, option, cache, serialize and transient. Those are the worst case, several calls deep and usually down an error path, not what a normal call pays.

What one call costs · 1 distinct outcome

One number would be a lie: the work depends on which branch runs. These are every distinct cost Services_JSON::encodeUnsafe() can have, taken from its control-flow graph on PHP 8.5.

WhenInstructionsCalls it makes
always24_deprecated_function(), setlocale(), setlocale(), ->_encode(), setlocale()

Across PHP versions

Compiles the same on PHP 7.4, 8.1, 8.2, 8.3, 8.4, 8.5 and 8.6-dev: 24 instructions, 24 executed per call, 0 branches. The work does not change between versions.

An instruction is not a fixed amount of time, so a matching count is not necessarily the same speed; what it rules out is a difference in the work itself.

Uses · 2

Used by · 1

Source code

View on Trac View on GitHub 

    function encodeUnsafe($var)    {        _deprecated_function( __METHOD__, '5.3.0', 'The PHP native JSON extension' );         // see bug #16908 - regarding numeric locale printing        $lc = setlocale(LC_NUMERIC, 0);        setlocale(LC_NUMERIC, 'C');        $ret = $this->_encode($var);        setlocale(LC_NUMERIC, $lc);        return $ret;            }

Changelog

Unchanged from 6.7.7 through 7.1.0.

  1. 6.7.7
  2. 6.8.8
  3. 6.9.7
  4. 7.0.4
  5. 7.1.0

Signature, return type and hooks compared across 5 parsed releases.

About this page

Parsed data
Generated from the wordpress-develop 7.1.0 tag, from src/wp-includes/class-json.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.
Corrections
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