Heim >Backend-Entwicklung >PHP-Tutorial >11 gängige PHP-Funktionen zum Teilen
Dieses Mal teile ich Ihnen Wissen über 11 häufig verwendete PHP-Funktionen mit. Diese Fähigkeiten können die Effizienz unserer täglichen Entwicklung erheblich verbessern und die Qualität unseres Codes verbessern.
1. Hervorgehobenes Breakpoint-Debugging-Tool (flexibel und praktisch, es kann nicht auf Breakpoints und Backgroups beschränkt werden):
function debug($data){ if(empty($data)){ var_dump($data); die; } if(!is_array($data)){ echo "<pre style='background-color: #000;color: #fff;font-size: 14px;min-height: 100px;line-height: 50px;'>"; echo "<span style='margin-left: 20px;font-size: 18px;'>"; print_r($data); echo "</span>"; echo ""; die; } echo "
"; echo "<br /><br /><br /><span style='margin-left: 20px;font-size: 13px;'>"; print_r($data); echo "</span><br /><br /><br />"; echo ""; die; }
/* @param $data array 数据 * @param $pid int 父类关系值 * @param $parentFieldstring 父类字段 * @param $pkField string 主键字段 * return array */ function getTreesPro($data,$pid='0',$parentField='pid',$pkField='id'){ $tree =array(); foreach($data as $k=>$v){ if($v[$parentField] == $pid){ $temp = getTreesPro($data,$v[$pkField]);//$data是对象则改为$v->$pkField if(!empty($temp)){ //分层 $v['son']= getTreesPro($data,$v[$pkField]); } $tree[] = $v; } } return $tree; }
function arrayToObject($arr){ if(is_array($arr)){ return (object) array_map(__FUNCTION__, $arr); }else{ return $arr; } }
function object2array(&$object) { $object = json_decode( json_encode( $object),true); return $object; }
function generateJnlNo() { date_default_timezone_set('PRC'); $yCode = array('A','B','C','D','E','F','G','H','I','J'); $orderSn = ''; $orderSn .= $yCode[(intval(date('Y')) - 1970) % 10]; $orderSn .= strtoupper(dechex(date('m'))); $orderSn .= date('d').substr(time(), -5); $orderSn .= substr(microtime(), 2, 5); $orderSn .= sprintf('%02d', mt_rand(0, 99)); //echo $orderSn,PHP_EOL; //得到唯一订单号:G107347128750079 return $orderSn; }
/** * 用法1: * @code php * $rows = array( * array('id' => 1, 'value' => '1-1'), * array('id' => 2, 'value' => '2-1'), *); * $hashmap = Helper_Array::hashMap($rows, 'id', 'value'); * * dump($hashmap); * // 输出结果为 * // array( * // 1 => '1-1', * // 2 => '2-1', * //) * @endcode * * 如果省略 $value_field 参数,则转换结果每一项为包含该项所有数据的数组。 * * 用法2: * @code php * $rows = array( * array('id' => 1, 'value' => '1-1'), * array('id' => 2, 'value' => '2-1'), *); * $hashmap = Helper_Array::hashMap($rows, 'id'); * * dump($hashmap); * // 输出结果为 * // array( * // 1 => array('id' => 1, 'value' => '1-1'), * // 2 => array('id' => 2, 'value' => '2-1'), * //) * @endcode * * @param array $arr 数据源 * @param string $key_field 按照什么键的值进行转换 * @param string $value_field 对应的键值 * * @return array 转换后的 HashMap 样式数组 */ function to_hashmap($arr, $key_field, $value_field = null){ $ret = array(); if ($value_field){ foreach ($arr as $row){ $ret[$row[$key_field]] = $row[$value_field]; } } else{ foreach ($arr as $row){ $ret[$row[$key_field]] = $row; } } return $ret; }Rufen Sie beispielsweise alle ID-Werte ab aus den $brandList-Daten :$ids = array_column($brandList,'id'); Deduplizierungsergebnis $ids= array_unique(array_column($brandList,'id'));
8. Client-Caching-Methode
if (!function_exists('array_column')) { /** * Returns the values from a single column of the input array, identified by * the $columnKey. * * Optionally, you may provide an $indexKey to index the values in the returned * array by the values from the $indexKey column in the input array. * * @param array $input A multi-dimensional array (record set) from which to pull * a column of values. * @param mixed $columnKey The column of values to return. This value may be the * integer key of the column you wish to retrieve, or it * may be the string key name for an associative array. * @param mixed $indexKey (Optional.) The column to use as the index/keys for * the returned array. This value may be the integer key * of the column, or it may be the string key name. * @return array */ function array_column($input = null, $columnKey = null, $indexKey = null){ // Using func_get_args() in order to check for proper number of // parameters and trigger errors exactly as the built-in array_column() // does in PHP 5.5. $argc = func_num_args(); $params = func_get_args(); if ($argc < 2) { trigger_error("array_column() expects at least 2 parameters, {$argc} given", E_USER_WARNING); return array(); } if (!is_array($params[0])) { trigger_error('array_column() expects parameter 1 to be array, ' . gettype($params[0]) . ' given', E_USER_WARNING); return array(); } if (!is_int($params[1]) && !is_float($params[1]) && !is_string($params[1]) && $params[1] !== null && !(is_object($params[1]) && method_exists($params[1], '__toString')) ) { trigger_error('array_column(): The column key should be either a string or an integer', E_USER_WARNING); return array(); } if (isset($params[2]) && !is_int($params[2]) && !is_float($params[2]) && !is_string($params[2]) && !(is_object($params[2]) && method_exists($params[2], '__toString')) ) { trigger_error('array_column(): The index key should be either a string or an integer', E_USER_WARNING); return array(); } $paramsInput = $params[0]; $paramsColumnKey = ($params[1] !== null) ? (string) $params[1] : null; $paramsIndexKey = null; if (isset($params[2])) { if (is_float($params[2]) || is_int($params[2])) { $paramsIndexKey = (int) $params[2]; } else { $paramsIndexKey = (string) $params[2]; } } $resultArray = array(); foreach ($paramsInput as $row) { $key = $value = null; $keySet = $valueSet = false; if ($paramsIndexKey !== null && array_key_exists($paramsIndexKey, $row)) { $keySet = true; $key = (string) $row[$paramsIndexKey]; } if ($paramsColumnKey === null) { $valueSet = true; $value = $row; } elseif (is_array($row) && array_key_exists($paramsColumnKey, $row)) { $valueSet = true; $value = $row[$paramsColumnKey]; } if ($valueSet) { if ($keySet) { $resultArray[$key] = $value; } else { $resultArray[] = $value; } } } return array_unique($resultArray); } }
public function cache($seconds_to_cache = 3600){ $ts = gmdate("D, d M Y H:i:s", time() + $seconds_to_cache) . " GMT"; header("Expires: $ts"); header("Pragma: cache"); header("Cache-Control: max-age=$seconds_to_cache"); }
public function disCache(){ $ts = gmdate("D, d M Y H:i:s",strtotime('-1 year')) . " GMT"; header("Expires: $ts"); header("Last-Modified: $ts"); header("Pragma: no-cache"); header("Cache-Control: no-cache, must-revalidate"); }
public function referer(){ return $_SERVER['HTTP_REFERER']; }
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