PHP _adSelectBuildContextArray函数代码示例

function _adSelect(&$aLinkedAds, $context, $source, $richMedia, $adArrayVar = 'ads', $cp = null)
{
    // If there are no linked ads, we can return
    if (!is_array($aLinkedAds)) {
        return;
    }
    if (!is_null($cp) && isset($aLinkedAds[$adArrayVar][$cp])) {
        $aAds = $aLinkedAds[$adArrayVar][$cp];
    } elseif (isset($aLinkedAds[$adArrayVar])) {
        $aAds = $aLinkedAds[$adArrayVar];
    } else {
        $aAds = array();
    }
    // If there are no linked ads of the specified type, we can return
    if (count($aAds) == 0) {
        return;
    }
    // Build preconditions
    $aContext = _adSelectBuildContextArray($aAds, $adArrayVar, $context);
    // New delivery algorithm: discard all invalid ads before iterating over them
    $aAds = _adSelectDiscardNonMatchingAds($aAds, $aContext, $source, $richMedia);
    // If there are no linked ads of the specified type, we can return
    if (count($aAds) == 0) {
        return;
    }
    if (!is_null($cp)) {
        // Scale priorities
        $total_priority = 0;
        foreach ($aAds as $ad) {
            $total_priority += $ad['priority'] * $ad['priority_factor'];
        }
        if ($total_priority) {
            if ($adArrayVar == 'eAds') {
                foreach ($aAds as $key => $ad) {
                    $aAds[$key]['priority'] = $ad['priority'] * $ad['priority_factor'] / $total_priority;
                }
            } else {
                foreach ($aAds as $key => $ad) {
                    $aAds[$key]['priority'] = $ad['priority'] * $ad['priority_factor'] * $aLinkedAds['priority'][$adArrayVar][$cp] / $total_priority;
                }
            }
        }
    } else {
        // Rescale priorities by weights
        _setPriorityFromWeights($aAds);
    }
    // Seed the random number generator
    global $n;
    mt_srand(floor((isset($n) && strlen($n) > 5 ? hexdec($n[0] . $n[2] . $n[3] . $n[4] . $n[5]) : 1000000) * (double) microtime()));
    $conf = $GLOBALS['_MAX']['CONF'];
    // Pick a float random number between 0 and 1, inclusive.
    $ranweight = mt_rand(0, $GLOBALS['_MAX']['MAX_RAND']) / $GLOBALS['_MAX']['MAX_RAND'];
    // Perform selection of an ad, based on the random number
    $low = 0;
    $high = 0;
    foreach ($aAds as $aLinkedAd) {
        if (!empty($aLinkedAd['priority'])) {
            $low = $high;
            $high += $aLinkedAd['priority'];
            if ($high > $ranweight && $low <= $ranweight) {
                return $aLinkedAd;
            }
        }
    }
    return;
}

function _adSelect(&$aLinkedAdInfos, $context, $source, $richMedia, $companion, $adArrayVar = 'ads', $cp = null)
{
    if (!is_array($aLinkedAdInfos)) {
        return;
    }
    if (!is_null($cp) && isset($aLinkedAdInfos[$adArrayVar][$cp])) {
        $aAds =& $aLinkedAdInfos[$adArrayVar][$cp];
    } elseif (is_null($cp) && isset($aLinkedAdInfos[$adArrayVar])) {
        $aAds =& $aLinkedAdInfos[$adArrayVar];
    } else {
        $aAds = array();
    }
    if (count($aAds) == 0) {
        return;
    }
    $aContext = _adSelectBuildContextArray($aAds, $adArrayVar, $context, $companion);
    _adSelectDiscardNonMatchingAds($aAds, $aContext, $source, $richMedia);
    if (count($aAds) == 0) {
        return;
    }
    global $n;
    mt_srand(floor((isset($n) && strlen($n) > 5 ? hexdec($n[0] . $n[2] . $n[3] . $n[4] . $n[5]) : 1000000) * (double) microtime()));
    $conf = $GLOBALS['_MAX']['CONF'];
    if ($adArrayVar == 'eAds') {
        if (!empty($conf['delivery']['ecpmSelectionRate'])) {
            $selection_rate = floatval($conf['delivery']['ecpmSelectionRate']);
            if (!_controlTrafficEnabled($aAds) || mt_rand(0, $GLOBALS['_MAX']['MAX_RAND']) / $GLOBALS['_MAX']['MAX_RAND'] <= $selection_rate) {
                $max_ecpm = 0;
                $top_ecpms = array();
                foreach ($aAds as $key => $ad) {
                    if ($ad['ecpm'] < $max_ecpm) {
                        continue;
                    } elseif ($ad['ecpm'] > $max_ecpm) {
                        $top_ecpms = array();
                        $max_ecpm = $ad['ecpm'];
                    }
                    $top_ecpms[$key] = 1;
                }
                if ($max_ecpm <= 0) {
                    $GLOBALS['_MAX']['ECPM_CONTROL'] = 1;
                    $total_priority = _setPriorityFromWeights($aAds);
                } else {
                    $GLOBALS['_MAX']['ECPM_SELECTION'] = 1;
                    $total_priority = count($top_ecpms);
                    foreach ($aAds as $key => $ad) {
                        if (!empty($top_ecpms[$key])) {
                            $aAds[$key]['priority'] = 1 / $total_priority;
                        } else {
                            $aAds[$key]['priority'] = 0;
                        }
                    }
                }
            } else {
                $GLOBALS['_MAX']['ECPM_CONTROL'] = 1;
                $total_priority = _setPriorityFromWeights($aAds);
            }
        }
    } else {
        if (isset($cp)) {
            $used_priority = 0;
            for ($i = 10; $i > $cp; $i--) {
                if (isset($aLinkedAdInfos['priority_used'][$adArrayVar][$i])) {
                    $used_priority += $aLinkedAdInfos['priority_used'][$adArrayVar][$i];
                }
            }
            if ($used_priority >= 1) {
                return $GLOBALS['OX_adSelect_SkipOtherPriorityLevels'];
            }
            $remaining_priority = 1 - $used_priority;
            $total_priority_orig = 0;
            foreach ($aAds as $ad) {
                $total_priority_orig += $ad['priority'] * $ad['priority_factor'];
            }
            $aLinkedAdInfos['priority_used'][$adArrayVar][$i] = $total_priority_orig;
            if ($total_priority_orig <= 0) {
                return;
            }
            if ($total_priority_orig > $remaining_priority || $companion) {
                $scaling_denom = $total_priority_orig;
                if ($cp >= PRI_ECPM_FROM && $cp <= PRI_ECPM_TO && !empty($conf['delivery']['ecpmSelectionRate'])) {
                    $selection_rate = floatval($conf['delivery']['ecpmSelectionRate']);
                    if (!_controlTrafficEnabled($aAds) || mt_rand(0, $GLOBALS['_MAX']['MAX_RAND']) / $GLOBALS['_MAX']['MAX_RAND'] <= $selection_rate) {
                        $GLOBALS['_MAX']['ECPM_SELECTION'] = 1;
                        foreach ($aAds as $key => $ad) {
                            $ecpms[] = $ad['ecpm'];
                            $adids[] = $key;
                        }
                        array_multisort($ecpms, SORT_DESC, $adids);
                        $p_avail = $remaining_priority;
                        $ad_count = count($aAds);
                        $i = 0;
                        while ($i < $ad_count) {
                            $l = $i;
                            while ($l < $ad_count - 1 && $ecpms[$l + 1] == $ecpms[$i]) {
                                $l++;
                            }
                            $p_needed = 0;
                            for ($a_idx = $i; $a_idx <= $l; $a_idx++) {
                                $id = $adids[$a_idx];
                                $p_needed += $aAds[$id]['priority'] * $aAds[$id]['priority_factor'];
//.........这里部分代码省略.........

/**
 * This function takes a group of ads, and selects the ad to show
 *
 * @param array   $aLinkedAds   The array of possible ads for this search criteria
 * @param array   $context      The context of this ad selection
 *                              - used for companion positioning
 *                              - and excluding banner/campaigns from this ad-call
 * @param string  $source       The "source" parameter passed into the adcall
 * @param boolean $richMedia    Does this invocation method allow for serving 3rd party/html ads
 * @param boolean $companion    Should ad selection only return companion ads?
 * @param string  $adArrayVar   The collection of ads in $aLinkedAds to select the ad from
 * @param integer $cp
 *
 * @return array|void           The ad-array for the selected ad or void if no ad selected
 */
function _adSelect(&$aLinkedAdInfos, $context, $source, $richMedia, $companion, $adArrayVar = 'ads', $cp = null)
{
    // If there are no linked ads, we can return
    if (!is_array($aLinkedAdInfos)) {
        return;
    }
    if (!is_null($cp) && isset($aLinkedAdInfos[$adArrayVar][$cp])) {
        $aAds =& $aLinkedAdInfos[$adArrayVar][$cp];
    } elseif (is_null($cp) && isset($aLinkedAdInfos[$adArrayVar])) {
        $aAds =& $aLinkedAdInfos[$adArrayVar];
    } else {
        $aAds = array();
    }
    // If there are no linked ads of the specified type, we can return
    if (count($aAds) == 0) {
        return;
    }
    // Build preconditions
    $aContext = _adSelectBuildContextArray($aAds, $adArrayVar, $context, $companion);
    // New delivery algorithm: discard all invalid ads before iterating over them
    // $aAds passed by ref here
    _adSelectDiscardNonMatchingAds($aAds, $aContext, $source, $richMedia);
    // If there are no linked ads of the specified type, we can return
    if (count($aAds) == 0) {
        return;
    }
    // Seed the random number generator
    global $n;
    mt_srand(floor((isset($n) && strlen($n) > 5 ? hexdec($n[0] . $n[2] . $n[3] . $n[4] . $n[5]) : 1000000) * (double) microtime()));
    $conf = $GLOBALS['_MAX']['CONF'];
    if ($adArrayVar == 'eAds') {
        if (!empty($conf['delivery']['ecpmSelectionRate'])) {
            // we should still allow there to be some portion of control
            // responses in order to avoid starving out any ad
            $selection_rate = floatval($conf['delivery']['ecpmSelectionRate']);
            if (!_controlTrafficEnabled($aAds) || mt_rand(0, $GLOBALS['_MAX']['MAX_RAND']) / $GLOBALS['_MAX']['MAX_RAND'] <= $selection_rate) {
                // Find the highest value eCPM ad(s) an naively select
                // from that set.
                $max_ecpm = 0;
                $top_ecpms = array();
                // build an eCPM sorted index for the ads
                foreach ($aAds as $key => $ad) {
                    if ($ad['ecpm'] < $max_ecpm) {
                        continue;
                    } elseif ($ad['ecpm'] > $max_ecpm) {
                        $top_ecpms = array();
                        $max_ecpm = $ad['ecpm'];
                    }
                    $top_ecpms[$key] = 1;
                }
                // fallback to weighted prioritization if ecpm weighting zeros out
                if ($max_ecpm <= 0) {
                    $GLOBALS['_MAX']['ECPM_CONTROL'] = 1;
                    $total_priority = _setPriorityFromWeights($aAds);
                } else {
                    // zero out the priority for all except ads with the
                    // highest eCPM value
                    $GLOBALS['_MAX']['ECPM_SELECTION'] = 1;
                    $total_priority = count($top_ecpms);
                    foreach ($aAds as $key => $ad) {
                        if (!empty($top_ecpms[$key])) {
                            $aAds[$key]['priority'] = 1 / $total_priority;
                        } else {
                            $aAds[$key]['priority'] = 0;
                        }
                    }
                }
            } else {
                $GLOBALS['_MAX']['ECPM_CONTROL'] = 1;
                $total_priority = _setPriorityFromWeights($aAds);
            }
        }
    } else {
        if (isset($cp)) {
            // How much of the priority space have we already covered?
            $used_priority = 0;
            for ($i = 10; $i > $cp; $i--) {
                if (isset($aLinkedAdInfos['priority_used'][$adArrayVar][$i])) {
                    $used_priority += $aLinkedAdInfos['priority_used'][$adArrayVar][$i];
                }
            }
            // sanity check, in case there is no space left.
            if ($used_priority >= 1) {
                return $GLOBALS['OX_adSelect_SkipOtherPriorityLevels'];
            }
//.........这里部分代码省略.........