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HomeBackend DevelopmentPHP Tutorial【已解决】php正则表达式问题

【已解决】

<code>echo '<meta charset="utf8">';
$pa = '%<p>(.*?)</p>%sim';
preg_match($pa, trim($message), $arr);
if(strpos("Welcome back",$message)){
    preg_match('/.\d{1,}.\d{1,2}/', $arr[1], $arr);
}else{
    preg_match('/.\d{1,}.\d{1,2}/', $arr[1], $arr);
}
echo($arr[0]);</code>

===================================================================

多语言网站,需要提取$299.00,其中$不确定,因为有可能是¥,£等符号,

可以确定的是$299.00前都包含一个空格,小数点后都有两位数,

换句话说,需要从:

<code>您的账户有未付账单金额 $299.00,请尽快完成付款。</code>

或者

<code>Your account has an outstanding balance of $299.00. Please make a payment at your earliest convenience.</code>

提取到$299.00。

中文显示:

<code><div class="col-md-12">
<div class="alert alert-warning alert-dismissable">
        <button type="button" class="close" data-dismiss="alert" aria-hidden="true">×</button>
        <strong>欢迎回来, 陶!</strong>
                <p>您的账户有未付账单金额 $299.00,请尽快完成付款。</p>
                <p><a href="/client/pay/index/USD/" class="btn btn-warning"><i class="fa fa-exclamation-triangle fa-fw"></i> 进行付款</a></p>
    </div>
</div></code>
<code><div class="alert alert-warning alert-dismissable">
        <button type="button" class="close" data-dismiss="alert" aria-hidden="true">×</button>
        <strong>Welcome back, 陶!</strong>
                <p>Your account has an outstanding balance of $299.00. Please make a payment at your earliest convenience.</p>
                <p><a href="/client/pay/index/USD/" class="btn btn-warning"><i class="fa fa-exclamation-triangle fa-fw"></i> Make Payment</a></p>
    </div></code>

回复内容:

【已解决】

<code>echo '<meta charset="utf8">';
$pa = '%<p>(.*?)</p>%sim';
preg_match($pa, trim($message), $arr);
if(strpos("Welcome back",$message)){
    preg_match('/.\d{1,}.\d{1,2}/', $arr[1], $arr);
}else{
    preg_match('/.\d{1,}.\d{1,2}/', $arr[1], $arr);
}
echo($arr[0]);</code>

===================================================================

多语言网站,需要提取$299.00,其中$不确定,因为有可能是¥,£等符号,

可以确定的是$299.00前都包含一个空格,小数点后都有两位数,

换句话说,需要从:

<code>您的账户有未付账单金额 $299.00,请尽快完成付款。</code>

或者

<code>Your account has an outstanding balance of $299.00. Please make a payment at your earliest convenience.</code>

提取到$299.00。

中文显示:

<code><div class="col-md-12">
<div class="alert alert-warning alert-dismissable">
        <button type="button" class="close" data-dismiss="alert" aria-hidden="true">×</button>
        <strong>欢迎回来, 陶!</strong>
                <p>您的账户有未付账单金额 $299.00,请尽快完成付款。</p>
                <p><a href="/client/pay/index/USD/" class="btn btn-warning"><i class="fa fa-exclamation-triangle fa-fw"></i> 进行付款</a></p>
    </div>
</div></code>
<code><div class="alert alert-warning alert-dismissable">
        <button type="button" class="close" data-dismiss="alert" aria-hidden="true">×</button>
        <strong>Welcome back, 陶!</strong>
                <p>Your account has an outstanding balance of $299.00. Please make a payment at your earliest convenience.</p>
                <p><a href="/client/pay/index/USD/" class="btn btn-warning"><i class="fa fa-exclamation-triangle fa-fw"></i> Make Payment</a></p>
    </div></code>

从代码来看,这段代码的内容除了名称和金额之外其他的应该是不变的内容,这样的话就比较好办了。
直接去匹配金额/\s(.\d+\.\d{2})/g就是了,前提是针对该段代码,如果是整个页面的话,需要把匹配局限到这段代码中来。。

已解决:

<code>echo '<meta charset="utf8">';
$pa = '%<p>(.*?)</p>%sim';
preg_match($pa, trim($message), $arr);
if(strpos("Welcome back",$message)){
    preg_match('/.\d{1,}.\d{1,2}/', $arr[1], $arr);
}else{
    preg_match('/.\d{1,}.\d{1,2}/', $arr[1], $arr);
}
echo($arr[0]);</code>

不知道题主的目的,提取这个金额做何用,是要去进行支付吗?如果是支付,这个金额不应该去服务端验证吗?毕竟这个价格前端可以篡改。

如果只是仅仅需要匹配的话,可以使用这个表达式

<code>$pattern = '#([\$|¥|£][1-9][0-9]*.[0-9]{2})#';
// $subject = '您的账户有未付账单金额 $299.00,请尽快完成付款。';
$subject = 'Your account has an outstanding balance of $299.00. Please make a payment at your earliest convenience.';
preg_match($pattern, $subject, $a);
var_dump($a);
// 输出:
array(2) {
  [0] =>
  string(7) "$299.00"
  [1] =>
  string(7) "$299.00"
}</code>

汗颜,不知道为什么变成了两个?原因不明

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