这次给大家带来11种php常用函数的知识分享，这些技能都能大大地提高我们日常开发的效率，提升我们的代码质量,下一起跟随小编来看一下。
1.高亮显示的断点调试工具(灵活实用它可以不局限于断点和backgroup):
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($data);
echo </span>;
echo </pre>;
die;
}
echo <pre style='background-color: #000;color: #fff;font-size: 14px;min-height: 100px;'>;
echo <br /><br /><br /><span style='margin-left: 20px;font-size: 13px;'>;
print_r($data);
echo </span><br /><br /><br />;
echo </pre>;
die;
}
2.递归无限极分类(要坚决鄙视写数据库操作在循环里或者写在递归里的垃圾代码)：/* @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 $tree;
}
3.数组转对象function arraytoobject($arr){
if(is_array($arr)){
return (object) array_map(__function__, $arr);
}else{
return $arr;
}
}
4.对象转数组function object2array(&$object) {
$object = json_decode( json_encode( $object),true);
return $object;
}
5.生成唯一订单号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;
}
6.将一个二维数组转换为
hashmap，并返回结果/**
* 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 $ret;
}
7.从二位数组中，取出某字段的所有结果(包含重复结果)如从$brandlist数据中取出所有id的值:$ids = array_column($brandlist,'id'); 去重结果 $ids= array_unique(array_column($brandlist,'id'));
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);
}
}
8.客户端缓存方法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");
}
9.客户端不缓存方法 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");
}
10.返回上一个页面来源public function referer(){
return $_server['http_referer'];
}
11.分页方法（在api方面用得比较多）public function pageinfo(){
$pageinfo = new \stdclass;
$pageinfo->length = isset($_get['length']) ? $_get['length'] : $this->length;
$pageinfo->page = isset($_get['page']) ? $_get['page'] : 1;
$pageinfo->end_id = isset($_get['end_id']) ? $_get['end_id'] : 1;
$pageinfo->offset= $pageinfo->page<=1 ? 0 : ($pageinfo->page-1) * $pageinfo->length;
$pageinfo->totalnum = $pageinfo->totalnum? $pageinfo->totalnum : 0;
$pageinfo->totalpage = $pageinfo->totalnum / $pageinfo->length;
return $pageinfo;
以上就是11种php常用函数分享的详细内容。