PHP开发过程中常用函数收藏

　　1.打印数组函数
复制代码 代码如下:
function _print($array)
{
echo (<pre>);
print_r($array);
echo (</pre>);
}

2.截取字串
复制代码 代码如下:
func_chgtitle
function func_chgtitle($str,$len)
{
if(strlen($str)>$len)
{
$tmpstr = ;
$strlen = $len;
for($i = 0; $i < $strlen; $i++)
{
if(ord(substr($str, $i, 1)) > 0xa0)
{
$tmpstr .= substr($str, $i, 2);
$i++;
}
else
$tmpstr .= substr($str, $i, 1);
}
return $tmpstr.;
}
else
{
return $str;
}
}

3.加载文件
复制代码 代码如下:
loadFile
function loadFile($filepath)
{
$filecontent = ;
$fptr = fopen($filepath,r);
if ($fptr)
{
while ($content = fgets($fptr,4096))
{
$filecontent .= $content;
}
fclose($fptr);
}
return $filecontent;
}

4.下载文件
downloadFile
复制代码 代码如下:
function downloadFile($path,$fileInfo)
{
$target_file = $path.$fileInfo[fileid];
$file_content = loadFile($target_file);
header(Content-Disposition: attachment; filename=.$fileInfo[filename]);
header(Content-type: .$fileInfo[filetype]);
header(Content-Length: .$fileInfo[filesize]);
echo $file_content;
}

5.数组排序
复制代码 代码如下:
/**
* @package BugFree
*
*
* Sort an two-dimension array by some level two items use array_multisort() function.
*
* sysSortArray($Array,Key1,SORT_ASC,SORT_RETULAR,Key2……)
* @param array $ArrayData the array to sort.
* @param string $KeyName1 the first item to sort by.
* @param string $SortOrder1 the order to sort by(SORT_ASCSORT_DESC)
* @param string $SortType1 the sort type(SORT_REGULARSORT_NUMERICSORT_STRING)
* @return array sorted array.
*/
function sysSortArray($ArrayData,$KeyName1,$SortOrder1 = SORT_ASC,$SortType1 = SORT_REGULAR)
{
if(!is_array($ArrayData))
{
return $ArrayData;
}
// Get args number.
$ArgCount = func_num_args();
// Get keys to sort by and put them to SortRule array.
for($I = 1;$I < $ArgCount;$I ++)
{
$Arg = func_get_arg($I);
if(!eregi(SORT,$Arg))
{
$KeyNameList[] = $Arg;
$SortRule[] = $.$Arg;
}
else
{
$SortRule[] = $Arg;
}
}
// Get the values according to the keys and put them to array.
foreach($ArrayData AS $Key => $Info)
{
foreach($KeyNameList AS $KeyName)
{
${$KeyName}[$Key] = $Info[$KeyName];
}
}
// Create the eval string and eval it.
if(count($ArrayData)>0)
{
$EvalString = array_multisort(.join(,,$SortRule).,$ArrayData);;
eval ($EvalString);
}
return $ArrayData;
}

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