我有一个数组如下所示
$fruit = array(' apple ','banana ', ' , ', ' cranberry ');
我想要一个数组，其中包含的值没有空白两侧，但它可以包含空值如何在php中做到这一点。输出数组应该是这样的
$fruit = array('apple','banana', ',', 'cranberry');
当前回答
function generateRandomString($length = 10) {
$characters = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
$charactersLength = strlen($characters);
$randomString = '';
for ($i = 0; $i < $length; $i++) {
$randomString .= $characters[rand(0, $charactersLength - 1)];
}
return $randomString;
}
function generateRandomSpaces() {
$output = '';
$i = rand(1, 10);
for ($j = 0; $j <= $i; $j++) {
$output .= " ";
}
return $output;
}
// Generating an array to test
$array = [];
for ($i = 0; $i <= 1000; $i++) {
$array[] = generateRandomSpaces() . generateRandomString(10) . generateRandomSpaces();
}
// ARRAY MAP
$start = microtime(true);
for ($i = 0; $i < 100000; $i++) {
$trimmed_array=array_map('trim',$array);
}
$time = (microtime(true) - $start);
echo "Array map: " . $time . " seconds\n";
// ARRAY WALK
$start = microtime(true);
for ($i = 0; $i < 100000; $i++) {
array_walk($array, 'trim');
}
$time = (microtime(true) - $start);
echo "Array walk : " . $time . " seconds\n";
// FOREACH
$start = microtime(true);
for ($i = 0; $i < 100000; $i++) {
foreach ($array as $index => $elem) {
$array[$index] = trim($elem);
}
}
$time = (microtime(true) - $start);
echo "Foreach: " . $time . " seconds\n";
// FOR
$start = microtime(true);
for ($i = 0; $i < 100000; $i++) {
for ($j = 0; $j < count($array) - 1; $j++) {
$array[$j] = trim($array[$j]);
}
}
$time = (microtime(true) - $start);
echo "For: " . $time . " seconds\n";
上面代码的输出是:
数组映射:8.6775720119476秒 数组行走:10.423238992691秒 Foreach: 7.3502039909363秒 对于:9.8266389369965秒
这个值当然可能会改变，但我想说foreach是最好的选择。
其他回答
Array_map ('trim'， $data)将所有子数组转换为null。如果只需要为字符串修剪空格，而保持其他类型不变，你可以使用:
$data = array_map(
function ($item) {
return is_string($item) ? trim($item) : $item;
},
$data
);
function trimArray(&$value)
{
$value = trim($value);
}
$pmcArray = array('php ','mysql ', ' code ');
array_walk($pmcArray, 'trimArray');
通过使用array_walk函数，我们可以从数组元素中删除空格，元素返回相同数组中的结果。
function trim_value(&$value)
{
$value = trim($value);
}
// ut_sreco_dis Module
public function disExcelUpload($file=""){
ini_set('MAX_EXECUTION_TIME', -1);
ini_set('memory_limit', '-1');
$file_upload = $file;
if (isset($file_upload) && !empty($file_upload)){
//You can add directly the Composer Autoloder in your controller:
require FCPATH . 'vendor/autoload.php';
try{
$objPHPExcel = PHPExcel_IOFactory::load($file_upload);
}
catch (Exception $e){
die('Error loading file "' . pathinfo($file_upload, PATHINFO_BASENAME) . '": '.@$e->getMessage());
}
$allDataInSheet = $objPHPExcel->getActiveSheet()->toArray(null, true, true, true);
$sheet = $objPHPExcel->getSheet(0);
$highestRow = $sheet->getHighestRow();
$highestCol = $sheet->getHighestColumn();
$highestco = $sheet->getHighestDataColumn();
$arrayCount = count($allDataInSheet);
$now = date("Y-m-d H:i:s");
$flag = 0;
$check_template = array(
'A' => 'FIN_ID',
'B' => 'SECCODE',
'C' => 'SCHEME_NO',
'D' => 'SEC_SCH',
'E' => 'DISNO',
'F' => 'DISQTY',
'G' => 'BILLQTY',
'H' => 'BILLREF',
'I' => 'BILLDT',
);
$input_template = $allDataInSheet[1];
array_walk($input_template, $this->trim_value);
$result = array_diff($check_template, $input_template);
if(empty($result))
{
$this->srObject->truncTableDis();
# loop for inserting data
for ($i = 2,$j=0; $i <= $highestRow; $i++){
$db_ch_ot = 64;
$fin_id = trim($allDataInSheet[$i][chr(++$db_ch_ot)]);
$sec_code = trim($allDataInSheet[$i][chr(++$db_ch_ot)]);
$sch_no = trim($allDataInSheet[$i][chr(++$db_ch_ot)]);
$sec_sch = trim($allDataInSheet[$i][chr(++$db_ch_ot)]);
$dis_no = trim($allDataInSheet[$i][chr(++$db_ch_ot)]);
$dis_qty = trim($allDataInSheet[$i][chr(++$db_ch_ot)]);
$bill_qty = trim($allDataInSheet[$i][chr(++$db_ch_ot)]);
$bill_ref = trim($allDataInSheet[$i][chr(++$db_ch_ot)]);
$bill_dt = trim($allDataInSheet[$i][chr(++$db_ch_ot)]);
if(empty($bill_dt)){
$bill_dt = null;
}else{
$dip_dt = date("Y-m-d",strtotime($bill_dt));
}
$dt = date('Y-m-d H:i:s');
$insert_data = array(
"fin_id_data" => $fin_id,
"sec_code_data" => $sec_code,
"sch_no_data" => $sch_no,
"sec_sch_data" => $sec_sch,
"dis_no_data" => $dis_no,
"dis_qty_data" => $dis_qty,
"bill_qty_data" => $bill_qty,
"bill_ref_data" => $bill_ref,
"bill_dt_data" => $bill_dt,
"created_at_data" => $dt,
"updated_at_data" => $dt,
);
if($this->srObject->insertSdisData($insert_data))
{
++$flag;
}
} //loop close
} else {
$this->session->set_flashdata('error', 'Error. Invalid Excel Template');
redirect(site_url('schill-bill-checking-suuti/sreco'));
}
$this->session->set_flashdata('success', 'File Uploaded Successfully ..'.' New Record Inserted : '.$flag);
redirect(site_url('schill-bill-checking-suuti/sreco'));
}
}
Array_walk()可以和trim()一起使用来修整数组
<?php
function trim_value(&$value)
{
$value = trim($value);
}
$fruit = array('apple','banana ', ' cranberry ');
var_dump($fruit);
array_walk($fruit, 'trim_value');
var_dump($fruit);
?>
参见http://www.php.net/manual/en/function.trim.php上的第二个例子
如果你想修剪和打印一维数组或多维数组的最深维度，你应该使用:
foreach($array as $key => $value)
{
$array[$key] = trim($value);
print("-");
print($array[$key]);
print("-");
print("<br>");
}
如果你想修剪但不想打印一维数组或多维数组的最深维度，你应该使用:
$array = array_map('trim', $array);
