一些php项目中比较通用的php自建函数的详解

本篇文章是对一些php项目中比较通用的php自建函数进行了详细的分析介绍，需要的朋友参考下

复制代码 代码如下:

/**
* curl访问程序接口
* @param string
* @return array
*/
function getCurlDate($url, $datas, $key) {
$datas['time'] = $_SERVER['REQUEST_TIME'] + 300;
$post_data['post'] = urlencode(authcode(serialize($datas), "ENCODE", $key));
// echo $url;
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
// 我们在POST数据哦！
curl_setopt($ch, CURLOPT_POST, 1);
// 把post的变量加上
curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);
$output = curl_exec($ch);
// dump(curl_error($ch));
curl_close($ch);
return json_decode($output, true);
}

复制代码 代码如下:

/**
* @获取文件扩展名
* @$pic string 图片路径
*/
function get_file_ext($pic) {
return substr($pic, strrpos($pic, '.') + 1);
}

复制代码 代码如下:

/**
* 字符串加密
* @param $string 需加密的字符
* @param $operation 加密或解密
* @param $key 网站加密key，香港空间，美国空间，防止破解
* @return string
*/
function authcode($string, $operation = 'DECODE', $key = '', $expiry = 0) {
$ckey_length = 4;
$key = md5($key ? $key : '^$');
$keya = md5(substr($key, 0, 16));
$keyb = md5(substr($key, 16, 16));
$keyc = $ckey_length ? ($operation == 'DECODE' ? substr($string, 0, $ckey_length) : substr(md5(microtime()), -$ckey_length)) : '';

$cryptkey = $keya . md5($keya . $keyc);
$key_length = strlen($cryptkey);

$string = $operation == 'DECODE' ? base64_decode(substr($string, $ckey_length)) : sprintf('%010d', $expiry ? $expiry + time() : 0) . substr(md5($string . $keyb), 0, 16) . $string;
$string_length = strlen($string);

$result = '';
$box = range(0, 255);

$rndkey = array();
for ($i = 0; $i <= 255; $i++) {
$rndkey[$i] = ord($cryptkey[$i % $key_length]);
}

for ($j = $i = 0; $i < 256; $i++) {
$j = ($j + $box[$i] + $rndkey[$i]) % 256;
$tmp = $box[$i];
$box[$i] = $box[$j];
$box[$j] = $tmp;
}

for ($a = $j = $i = 0; $i < $string_length; $i++) {
$a = ($a + 1) % 256;
$j = ($j + $box[$a]) % 256;
$tmp = $box[$a];
$box[$a] = $box[$j];
$box[$j] = $tmp;
$result .= chr(ord($string[$i]) ^ ($box[($box[$a] + $box[$j]) % 256]));
}

if ($operation == 'DECODE') {
if ((substr($result, 0, 10) == 0 || substr($result, 0, 10) - time() > 0) && substr($result, 10, 16) == substr(md5(substr($result, 26) . $keyb), 0, 16)) {
return substr($result, 26);
} else {
return '';
}
} else {
return $keyc . str_replace('=', '', base64_encode($result));
}
}

复制代码 代码如下:

/**
* 字符串转十六进制
* @param unknown_type $s
*/
function str2hex($s) {
$r = "";
$hexes = array ("0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f");
for ($i=0; $i $r .= ($hexes [(ord($s{$i}) >> 4)] . $hexes [(ord($s{$i}) & 0xf)]);
return $r;
}

复制代码 代码如下:

/**
* 十六进制转字符串
* @param unknown_type $s
*/
function hex2str($s) {
$r = "";
for ( $i = 0; $i {
$x1 = ord($s{$i});
$x1 = ($x1>=48 && $x1<58) ? $x1-48 : $x1-97+10;
$x2 = ord($s{$i+1});
$x2 = ($x2>=48 && $x2<58) ? $x2-48 : $x2-97+10;
$r .= chr((($x1 << 4) & 0xf0) | ($x2 & 0x0f));
}
return $r;
}

复制代码 代码如下:

/**
* 返回经addslashes处理过的字符串或数组
* @param $string 需要处理的字符串或数组
* @return mixed
*/
function new_addslashes($string){
if(!is_array($string)) return addslashes($string);
foreach($string as $key => $val) $string[$key] = new_addslashes($val);
return $string;
}

/**/
function addslashes_deep($string)
{
return is_array($string) ? array_map('addslashes_deep', $string) : addslashes($string);
}

复制代码 代码如下:

/**
* 返回经stripslashes处理过的字符串或数组
* @param $string 需要处理的字符串或数组
* @return mixed
*/
function new_stripslashes($string) {
if(!is_array($string)) return stripslashes($string);
foreach($string as $key => $val) $string[$key] = new_stripslashes($val);
return $string;
}
/**/
function stripslashes_deep($string)
{
return is_array($string) ? array_map('stripslashes_deep', $string) : stripslashes($string);
}

复制代码 代码如下: