一些php项目中比较通用的php自建函数的详解
发布时间：2020-12-13 06:20:27 所属栏目：PHP教程 来源：网络整理
导读：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。 FONT style="COLOR: #ff0000"1.请求接口的处理函数 div class="codetitle" a style="CURSOR: pointer" data="93468" class="copybut" id="copy
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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。 <FONT style="COLOR: #ff0000">1.请求接口的处理函数<div class="codetitle"><a style="CURSOR: pointer" data="93468" class="copybut" id="copybut93468" onclick="doCopy('code93468')"> 代码如下:<div class="codebody" id="code93468">/ 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($output,true); } <FONT style="COLOR: #ff0000">2.获取文件扩展名<div class="codetitle"><a style="CURSOR: pointer" data="85182" class="copybut" id="copybut85182" onclick="doCopy('code85182')"> 代码如下:<div class="codebody" id="code85182">/ @获取文件扩展名 @$pic string 图片路径 */ function get_file_ext($pic) { return substr($pic,strrpos($pic,'.') + 1); } <FONT style="COLOR: #ff0000">3.可逆的加密、解密函数<div class="codetitle"><a style="CURSOR: pointer" data="63156" class="copybut" id="copybut63156" onclick="doCopy('code63156')"> 代码如下:<div class="codebody" id="code63156">/ 字符串加密 @param $string 需加密的字符 @param $operation 加密或解密 @param $key 网站加密key，防止破解 @return string / function authcode($string,$operation = 'DECODE',$key = '',$expiry = 0) { $ckey_length = 4; $key = md5($key ? $key : '^www.itokit.com$'); $keya = md5(substr($key,16)); $keyb = md5(substr($key,16,16)); $keyc = $ckey_length ? ($operation == 'DECODE' ? substr($string,$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),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,10) == 0 || substr($result,10) - time() > 0) && substr($result,10,16) == substr(md5(substr($result,26) . $keyb),16)) { return substr($result,26); } else { return ''; } } else { return $keyc . str_replace('=','',base64_encode($result)); } } <FONT style="COLOR: #ff0000">4.字符串转十六进制<div class="codetitle"><a style="CURSOR: pointer" data="2677" class="copybut" id="copybut2677" onclick="doCopy('code2677')"> 代码如下:<div class="codebody" id="code2677">/ 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; $i<strlen($s); $i++) $r .= ($hexes [(ord($s{$i}) >> 4)] . $hexes [(ord($s{$i}) & 0xf)]); return $r; } <FONT style="COLOR: #ff0000">5.十六进制转字符串<div class="codetitle"><a style="CURSOR: pointer" data="84114" class="copybut" id="copybut84114" onclick="doCopy('code84114')"> 代码如下:<div class="codebody" id="code84114">/ 十六进制转字符串 @param unknown_type $s */ function hex2str($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; } <FONT style="COLOR: #ff0000">6.返回经addslashes处理过的字符串或数组<div class="codetitle"><a style="CURSOR: pointer" data="66361" class="copybut" id="copybut66361" onclick="doCopy('code66361')"> 代码如下:<div class="codebody" id="code66361">/ 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); } <FONT style="COLOR: #ff0000">7.返回经stripslashes处理过的字符串或数组<div class="codetitle"><a style="CURSOR: pointer" data="93064" class="copybut" id="copybut93064" onclick="doCopy('code93064')"> 代码如下:<div class="codebody" id="code93064">/ 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); } <FONT style="COLOR: #ff0000">8.返回经 htmlspecialchars 处理过的字符串或数组<div class="codetitle"><a style="CURSOR: pointer" data="12954" class="copybut" id="copybut12954" onclick="doCopy('code12954')"> 代码如下:<div class="codebody" id="code12954">/ 返回经 htmlspecialchars 处理过的字符串或数组 @param $string 需要处理的字符串或数组 @return mixed / function new_html_special_chars($string) { if(!is_array($string)) return htmlspecialchars($string); foreach($string as $key => $val) $string[$key] = new_html_special_chars($val); return $string; } <FONT style="COLOR: #ff0000">9.获取请求ip<div class="codetitle"><a style="CURSOR: pointer" data="79842" class="copybut" id="copybut79842" onclick="doCopy('code79842')"> 代码如下:<div class="codebody" id="code79842">/ 获取请求ip @return ip地址 / function ip() { 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 = $_SERVER['REMOTE_ADDR']; } return preg_match ( '/[d.]{7,15}/',$ip,$matches ) ? $matches [0] : ''; } <FONT style="COLOR: #ff0000">10.字符截取 支持UTF8/GBK<div class="codetitle"><a style="CURSOR: pointer" data="79178" class="copybut" id="copybut79178" onclick="doCopy('code79178')"> 代码如下:<div class="codebody" id="code79178">/* 字符截取 支持UTF8/GBK @param $string @param $length @param $dot / function str_cut($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,$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; } <FONT style="COLOR: #ff0000">11.产生随机字符串<div class="codetitle"><a style="CURSOR: pointer" data="54611" class="copybut" id="copybut54611" onclick="doCopy('code54611')"> 代码如下:<div class="codebody" id="code54611">/ 产生随机字符串 @param int $length 输出长度 @param string $chars 可选的 ，默认为 0123456789 @return string 字符串 / function random($length,$chars = '0123456789') { $hash = ''; $max = strlen($chars) - 1; for($i = 0; $i < $length; $i++) { $hash .= $chars[mt_rand(0,$max)]; } return $hash; } <FONT style="COLOR: #ff0000">12.将字符串转换为数组<div class="codetitle"><a style="CURSOR: pointer" data="28312" class="copybut" id="copybut28312" onclick="doCopy('code28312')"> 代码如下:<div class="codebody" id="code28312">/* 将字符串转换为数组 @param string $data 字符串 @return array 返回数组格式，如果，data为空，则返回空数组 / function string2array($data) { if($data == '') return array(); eval("$array = $data;"); return $array; } <FONT style="COLOR: #ff0000">13.将数组转换为字符串<div class="codetitle"><a style="CURSOR: pointer" data="80651" class="copybut" id="copybut80651" onclick="doCopy('code80651')"> 代码如下:<div class="codebody" id="code80651">/ 将数组转换为字符串 @param array $data 数组 @param bool $isformdata 如果为0，则不使用new_stripslashes处理，可选参数，默认为1 @return string 返回字符串，如果，data为空，则返回空 / function array2string($data,$isformdata = 1) { if($data == '') return ''; if($isformdata) $data = new_stripslashes($data); return addslashes(var_export($data,TRUE)); } <FONT style="COLOR: #ff0000">14.转换字节数为其他单位<div class="codetitle"><a style="CURSOR: pointer" data="23635" class="copybut" id="copybut23635" onclick="doCopy('code23635')"> 代码如下:<div class="codebody" id="code23635">/ 转换字节数为其他单位 @param string $filesize 字节大小 @return string 返回大小 / function sizecount($filesize) { if ($filesize >= 1073741824) { $filesize = round($filesize / 1073741824 100) / 100 .' GB'; } elseif ($filesize >= 1048576) { $filesize = round($filesize / 1048576 100) / 100 .' MB'; } elseif($filesize >= 1024) { $filesize = round($filesize / 1024 * 100) / 100 . ' KB'; } else { $filesize = $filesize.' Bytes'; } return $filesize; } （编辑：李大同） 【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容! |