当序列化字符串为空时，如何在php中隐藏在文本中？
当序列化字符串为空时，如何在php中隐藏在文本中？
提问于 2018-08-17 02:08:02
我在一个网站上工作，我想隐藏文本(Hello World，点A和点B)时，serialized字符串为空。下面是我的代码：
<p class="font-weight-bold">Hello World</p>
<p class="font-weight-bold">Point A</p>
<?php
$serialized = '';
for ($i = 0; $i < count($data['item']->process_out); $i++) {
if(strcmp($data['item']->process_out[$i]->processs_type, "pickup") == 0)
{
$serialized .= strtolower($data['item']->process_out[$i]->processs_times);
}
}
if($serialized != '')
{
$unserialized = unserialize( $serialized );
foreach($unserialized as $key=>$value)
{
echo $key." ".$value['start']." ".$value['end']."<br/>";
}
}
?>
<p class="mt-2 font-weight-bold text-center">Point B</p>
<?php
$serialized = '';
for ($i = 0; $i < count($data['item']->process_out); $i++) {
if(strcmp($data['item']->process_out[$i]->processs_type, "location_pickup") == 0)
{
$serialized .= strtolower($data['item']->process_out[$i]->processs_times);
}
}
if($serialized != '')
{
$unserialized = unserialize( $serialized );
foreach($unserialized as $key=>$value)
{
echo $key." ".$value['start']." ".$value['end']."<br/>";
}
}
?>问题陈述：
在Hello World内部，我有两个部分-- Point A和Point B。
- 如果
Point A和Point B都为空(表示serialized字符串为空)，并且没有要显示的数据，则我根本不想显示Hello World、Point A和Point B的<p>文本。但如果其中任何一个存在(表示D20字符串不为空)，则我希望显示D22和D23的文本(可以是D24或Point B).
这有可能做到吗？当序列化字符串为空时，它显示如下：
我不希望在Point A或Point B的serialized字符串为空时打印这些文本。
回答 1
Stack Overflow用户
回答已采纳
发布于 2018-08-17 04:56:46
您应该将html输出放在几个变量中(包括'Hello World')，并在完成所有测试时在最后输出。
<?php
// pre-set/initialize some html templates/strings to be used later
$html = '';
$helloWorld_header = '<p class="font-weight-bold">Hello World</p>';
$pointA_header = '<p class="font-weight-bold">Point A</p>';
$pointA_content = '';
$pointB_header = '<p class="mt-2 font-weight-bold text-center">Point B</p>';
$pointB_content = '';
$pointA_found = $pointB_found = false; // initialize both to false
$pointA_serialized = '';
for ($i = 0; $i < count($data['item']->process_out); $i++) {
if(strcmp($data['item']->process_out[$i]->processs_type, "pickup") == 0) {
$pointA_serialized .= strtolower($data['item']->process_out[$i]->processs_times);
}
}
if($pointA_serialized != '') {
$pointA_found = true;
$unserialized = unserialize( $pointA_serialized );
foreach($unserialized as $key=>$value) {
$pointA_content .= $key." ".$value['start']." ".$value['end']."<br/>";
}
// add everything from pointA to $html
$html .= $pointA_header . $pointA_content;
}
$pointB_serialized = '';
for ($i = 0; $i < count($data['item']->process_out); $i++) {
if(strcmp($data['item']->process_out[$i]->processs_type, "location_pickup") == 0) {
$pointB_serialized .= strtolower($data['item']->process_out[$i]->processs_times);
}
}
if($pointB_serialized != '') {
$pointB_found = true;
$unserialized = unserialize( $pointB_serialized );
foreach($unserialized as $key=>$value) {
$pointB_content . $key." ".$value['start']." ".$value['end']."<br/>";
}
// add everything from pointB to $html
$html .= $pointB_header . $pointB_content;
}
// if pointA or pointB is set/found...
if($pointA_found || $pointB_found) {
// ... add the main header before the rest
$html = $helloWorld_header + $html;
}
// do the actual output
echo $html
?>这只是您所拥有的东西的快速修复。会有更优雅的方式来做到这一点。我会将pointA和pointB放在一个共享函数中，因为您通常会做两次相同的事情。
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原文链接：
https://stackoverflow.com/questions/51882998
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