APCBagOStuff.php

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<?php
class APCBagOStuff extends MediumSpecificBagOStuff {
    private $nativeSerialize;
 
    const KEY_SUFFIX = ':4';
 
    public function __construct( array $params = [] ) {
        $params['segmentationSize'] = $params['segmentationSize'] ?? INF;
        parent::__construct( $params );
        // The extension serializer is still buggy, unlike "php" and "igbinary"
        $this->nativeSerialize = ( ini_get( 'apc.serializer' ) !== 'default' );
    }
 
    protected function doGet( $key, $flags = 0, &$casToken = null ) {
        $casToken = null;
 
        $blob = apc_fetch( $key . self::KEY_SUFFIX );
        $value = $this->nativeSerialize ? $blob : $this->unserialize( $blob );
        if ( $value !== false ) {
            $casToken = $blob; // don't bother hashing this
        }
 
        return $value;
    }
 
    protected function doSet( $key, $value, $exptime = 0, $flags = 0 ) {
        apc_store(
            $key . self::KEY_SUFFIX,
            $this->nativeSerialize ? $value : $this->serialize( $value ),
            $exptime
        );
 
        return true;
    }
 
    protected function doAdd( $key, $value, $exptime = 0, $flags = 0 ) {
        return apc_add(
            $key . self::KEY_SUFFIX,
            $this->nativeSerialize ? $value : $this->serialize( $value ),
            $exptime
        );
    }
 
    protected function doDelete( $key, $flags = 0 ) {
        apc_delete( $key . self::KEY_SUFFIX );
 
        return true;
    }
 
    public function incr( $key, $value = 1, $flags = 0 ) {
        return apc_inc( $key . self::KEY_SUFFIX, $value );
    }
 
    public function decr( $key, $value = 1, $flags = 0 ) {
        return apc_dec( $key . self::KEY_SUFFIX, $value );
    }
}