一些php项目中比较通用的php自建函数-优快云博客

本文汇总了一系列常用的PHP函数，包括请求接口处理、文件扩展名获取、字符串加密解密等实用功能，适用于多种项目开发场景。

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以下一些php函数是我们it动力最常用的项目开发函数，这些函数还算是在比较多的项目中使用到的，也是比较通用的。

1.请求接口的处理函数

/**
*curl访问程序接口
*@paramstring
*@returnarray
*/
functiongetCurlDate($url,$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);
returnjson_decode($output,true);
}

2.获取文件扩展名

/**
*@获取文件扩展名
*@$picstring图片路径
*/
functionget_file_ext($pic){
returnsubstr($pic,strrpos($pic,'.')+1);
}

3.可逆的加密、解密函数

/**
*字符串加密
*@param$string需加密的字符
*@param$operation加密或解密
*@param$key网站加密key，防止破解
*@returnstring
*/
functionauthcode($string,$operation='DECODE',$key='',$expiry=0){
$ckey_length=4;
$key=md5($key?$key:'^www.itokit.com$');
$keya=md5(substr($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)){
returnsubstr($result,26);
}else{
return'';
}
}else{
return$keyc.str_replace('=','',base64_encode($result));
}
}

4.字符串转十六进制

/**
*字符串转十六进制
*@paramunknown_type$s
*/
functionstr2hex($s){
$r="";
$hexes=array("0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f");
for($i=0;$i<strlen($s);$i++)
$r.=($hexes[(ord($s{$i})>>4)].$hexes[(ord($s{$i})&0xf)]);
return$r;
}

5.十六进制转字符串

/**
*十六进制转字符串
*@paramunknown_type$s
*/
functionhex2str($s){
$r="";
for($i=0;$i<strlen($s);$i+=2)
{
$x1=ord($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;
}

6.返回经addslashes处理过的字符串或数组

/**
*返回经addslashes处理过的字符串或数组
*@param$string需要处理的字符串或数组
*@returnmixed
*/
functionnew_addslashes($string){
if(!is_array($string))returnaddslashes($string);
foreach($stringas$key=>$val)$string[$key]=new_addslashes($val);
return$string;
}
/**/
functionaddslashes_deep($string)
{
returnis_array($string)?array_map('addslashes_deep',$string):addslashes($string);
}

7.返回经stripslashes处理过的字符串或数组

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

8.返回经 htmlspecialchars处理过的字符串或数组

/**
*返回经 htmlspecialchars处理过的字符串或数组
*@param$string需要处理的字符串或数组
*@returnmixed
*/
functionnew_html_special_chars($string){
if(!is_array($string))returnhtmlspecialchars($string);
foreach($stringas$key=>$val)$string[$key]=new_html_special_chars($val);
return$string;
}

9.获取请求ip

/**
*获取请求ip
*
*@returnip地址
*/
functionip(){
if(getenv('HTTP_CLIENT_IP')&&strcasecmp(getenv('HTTP_CLIENT_IP'),'unknown')){
$ip=getenv('HTTP_CLIENT_IP');
}elseif(getenv('HTTP_X_FORWARDED_FOR')&&strcasecmp(getenv('HTTP_X_FORWARDED_FOR'),'unknown')){
$ip=getenv('HTTP_X_FORWARDED_FOR');
}elseif(getenv('REMOTE_ADDR')&&strcasecmp(getenv('REMOTE_ADDR'),'unknown')){
$ip=getenv('REMOTE_ADDR');
}elseif(isset($_SERVER['REMOTE_ADDR'])&&$_SERVER['REMOTE_ADDR']&&strcasecmp($_SERVER['REMOTE_ADDR'],'unknown')){
$ip=$_SERVER['REMOTE_ADDR'];
}
returnpreg_match('/[\d\.]{7,15}/',$ip,$matches)?$matches[0]:'';
}

10.字符截取支持UTF8/GBK

/**
*字符截取支持UTF8/GBK
*@param$string
*@param$length
*@param$dot
*/
functionstr_cut($string,$length,$dot='...'){
$strlen=strlen($string);
if($strlen<=$length)return$string;
$string=str_replace(array('','','&','"',''','“','”','—','<','>','·','…'),array('∵','','&','"',"'",'“','”','—','<','>','·','…'),$string);
$strcut='';
if(strtolower(CHARSET)=='utf-8'){
$length=intval($length-strlen($dot)-$length/3);
$n=$tn=$noc=0;
while($n<strlen($string)){
$t=ord($string[$n]);
if($t==9||$t==10||(32<=$t&&$t<=126)){
$tn=1;$n++;$noc++;
}elseif(194<=$t&&$t<=223){
$tn=2;$n+=2;$noc+=2;
}elseif(224<=$t&&$t<=239){
$tn=3;$n+=3;$noc+=2;
}elseif(240<=$t&&$t<=247){
$tn=4;$n+=4;$noc+=2;
}elseif(248<=$t&&$t<=251){
$tn=5;$n+=5;$noc+=2;
}elseif($t==252||$t==253){
$tn=6;$n+=6;$noc+=2;
}else{
$n++;
}
if($noc>=$length){
break;
}
}
if($noc>$length){
$n-=$tn;
}
$strcut=substr($string,0,$n);
$strcut=str_replace(array('∵','&','"',"'",'“','”','—','<','>','·','…'),array('','&','"',''','“','”','—','<','>','·','…'),$strcut);
}else{
$dotlen=strlen($dot);
$maxi=$length-$dotlen-1;
$current_str='';
$search_arr=array('&','','"',"'",'“','”','—','<','>','·','…','∵');
$replace_arr=array('&','','"',''','“','”','—','<','>','·','…','');
$search_flip=array_flip($search_arr);
for($i=0;$i<$maxi;$i++){
$current_str=ord($string[$i])>127?$string[$i].$string[++$i]:$string[$i];
if(in_array($current_str,$search_arr)){
$key=$search_flip[$current_str];
$current_str=str_replace($search_arr[$key],$replace_arr[$key],$current_str);
}
$strcut.=$current_str;
}
}
return$strcut.$dot;
}