Blacklists a function from being JIT compiled

# opcache_jit_blacklist

(PHP 8 >= 8.4.0)

opcache_jit_blacklist — Blacklists a function from being JIT compiled

### Description

opcache_jit_blacklist( Closure `$closure` ): void

This function blacklists a particular function from being JIT compiled when Tracing JIT is in use. The function is specified using a Closure.

Warning

Any parts of the function that were already JIT compiled remain unaffected and will still be JIT compiled.

### Parameters

`closure`
  The function to blacklist, represented as a first class callable. It is also possible to pass an anonymous function, in which case the anonymous function itself is blacklisted.

### Return Values

No value is returned.

### Examples

Example #1 opcache_jit_blacklist() basic example

`<?php
function foo() {
$x = 1;
$x += 0;
++$x;
var_dump($x);
}
opcache_jit_blacklist(foo(...));
foo();
?>`

### See Also

- opcache_invalidate() - Invalidates a cached script
- opcache_reset() - Resets the contents of the opcode cache

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