三目运算求编译成if语句。该如何处理
三目运算求编译成if语句。。。
还有红色的-号那是个什么概念?
$keyc = $ckey_length ? ($operation == 'DECODE' ? substr($string, 0, $ckey_length): substr(md5(microtime()), -$ckey_length)) : '';
------解决方案--------------------
substr 函数的第2个参数 翻翻手册吧. 从哪里开始截取
------解决方案--------------------
------解决方案--------------------
- PHP code
if($ckey_length ){
if ($operation == 'DECODE') {
$keyc=substr($string, 0, $ckey_length);
}else{
$keyc=substr(md5(microtime()), -$ckey_length);
}
}else{
$keyc='';
} <div class="clear">
</div>
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