- preg_match_all: documentation ( source)
<?php
$app_filename = "AntivirusSecurity_02_cb-508164-ce_ac8a0e5e-35f8-4c7b-b591-7e28cab94b4e.apk";
//$app_filename = "AntivirusSecurity_02_[508164]_ac8a0e5e-35f8-4c7b-b591-7e28cab94b4e.apk";
$app_filename = "AntivirusSecurity_748164.apk";
//$app_filename = "AntivirusSecurity_3542683-1.apk";
//$app_filename = "AntivirusSecurity_1.apk";
$app_filename = "AntivirusSecurity_cb-3590671-ce.apk";
function extract_click_id_from_filename($app_filename=''){
$minimum_click_id_length = 4;
if(empty($app_filename))
return NULL;
// New standard format:
$click_id_fence_beginning = 'cb-';
$click_id_fence_end = '-ce';
preg_match_all("^{$click_id_fence_beginning}(.*?){$click_id_fence_end}^", $app_filename, $fields);
if(!empty($fields[1][0]))
return $fields[1][0];
// Legacy format 1:
$click_id_fence_beginning = 'AntivirusSecurity_';
$click_id_fence_end = '\.apk';
preg_match_all("^{$click_id_fence_beginning}([0-9]*?){$click_id_fence_end}^", $app_filename, $fields);
if(!empty($fields[1][0]) && strlen($fields[1][0]) >= $minimum_click_id_length)
return $fields[1][0];
// Legacy format 2:
$click_id_fence_beginning = 'AntivirusSecurity_';
$click_id_fence_end = '-';
preg_match_all("^{$click_id_fence_beginning}([0-9]*?){$click_id_fence_end}^", $app_filename, $fields);
if(!empty($fields[1][0]) && strlen($fields[1][0]) >= $minimum_click_id_length)
return $fields[1][0];
// default:
return NULL;
}
echo extract_click_id_from_filename($app_filename);