PHP实现将科学计数法转换为原始数字字符串的方法

yuyu5

北京上课了讲述了PHP实现将科学计数法转换为原始数字字符串的方法，分享给大家供大家参考。

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2. <P><SPAN style="WIDOWS: 1; TEXT-TRANSFORM: none; BACKGROUND-COLOR: rgb(255,255,255); TEXT-INDENT: 0px; LETTER-SPACING: normal; DISPLAY: inline !important; FONT: 15px/26px 微软雅黑, Verdana, Arial, Tahoma; WHITE-SPACE: normal; FLOAT: none; COLOR: rgb(51,51,51); WORD-SPACING: 0px; -webkit-text-stroke-width: 0px"></SPAN> <SPAN style="WIDOWS: 1; TEXT-TRANSFORM: none; BACKGROUND-COLOR: rgb(245,252,238); TEXT-INDENT: 0px; LETTER-SPACING: normal; DISPLAY: inline !important; FONT: 14px/26px 微软雅黑, Verdana, Arial, Tahoma; WHITE-SPACE: normal; FLOAT: none; COLOR: rgb(51,51,51); WORD-SPACING: 0px; -webkit-text-stroke-width: 0px">function NumToStr($num){<SPAN class=Apple-converted-space> </SPAN></SPAN>
   
3. <SPAN style="WIDOWS: 1; TEXT-TRANSFORM: none; BACKGROUND-COLOR: rgb(245,252,238); TEXT-INDENT: 0px; LETTER-SPACING: normal; DISPLAY: inline !important; FONT: 14px/26px 微软雅黑, Verdana, Arial, Tahoma; WHITE-SPACE: normal; FLOAT: none; COLOR: rgb(51,51,51); WORD-SPACING: 0px; -webkit-text-stroke-width: 0px">    if (stripos($num,'e')===false) return $num;<SPAN class=Apple-converted-space> </SPAN></SPAN>
   
4. <SPAN style="WIDOWS: 1; TEXT-TRANSFORM: none; BACKGROUND-COLOR: rgb(245,252,238); TEXT-INDENT: 0px; LETTER-SPACING: normal; DISPLAY: inline !important; FONT: 14px/26px 微软雅黑, Verdana, Arial, Tahoma; WHITE-SPACE: normal; FLOAT: none; COLOR: rgb(51,51,51); WORD-SPACING: 0px; -webkit-text-stroke-width: 0px">    $num = trim(preg_replace('/[=\'"]/','',$num,1),'"');//出现科学计数法，还原成字符串<SPAN class=Apple-converted-space> </SPAN></SPAN>
   
5. <SPAN style="WIDOWS: 1; TEXT-TRANSFORM: none; BACKGROUND-COLOR: rgb(245,252,238); TEXT-INDENT: 0px; LETTER-SPACING: normal; DISPLAY: inline !important; FONT: 14px/26px 微软雅黑, Verdana, Arial, Tahoma; WHITE-SPACE: normal; FLOAT: none; COLOR: rgb(51,51,51); WORD-SPACING: 0px; -webkit-text-stroke-width: 0px">    $result = "";<SPAN class=Apple-converted-space> </SPAN></SPAN>
   
6. <SPAN style="WIDOWS: 1; TEXT-TRANSFORM: none; BACKGROUND-COLOR: rgb(245,252,238); TEXT-INDENT: 0px; LETTER-SPACING: normal; DISPLAY: inline !important; FONT: 14px/26px 微软雅黑, Verdana, Arial, Tahoma; WHITE-SPACE: normal; FLOAT: none; COLOR: rgb(51,51,51); WORD-SPACING: 0px; -webkit-text-stroke-width: 0px">    while ($num > 0){<SPAN class=Apple-converted-space> </SPAN></SPAN>
   
7. <SPAN style="WIDOWS: 1; TEXT-TRANSFORM: none; BACKGROUND-COLOR: rgb(245,252,238); TEXT-INDENT: 0px; LETTER-SPACING: normal; DISPLAY: inline !important; FONT: 14px/26px 微软雅黑, Verdana, Arial, Tahoma; WHITE-SPACE: normal; FLOAT: none; COLOR: rgb(51,51,51); WORD-SPACING: 0px; -webkit-text-stroke-width: 0px">        $v = $num - floor($num / 10)*10;<SPAN class=Apple-converted-space> </SPAN></SPAN>
   
8. <SPAN style="WIDOWS: 1; TEXT-TRANSFORM: none; BACKGROUND-COLOR: rgb(245,252,238); TEXT-INDENT: 0px; LETTER-SPACING: normal; DISPLAY: inline !important; FONT: 14px/26px 微软雅黑, Verdana, Arial, Tahoma; WHITE-SPACE: normal; FLOAT: none; COLOR: rgb(51,51,51); WORD-SPACING: 0px; -webkit-text-stroke-width: 0px">        $num = floor($num / 10);<SPAN class=Apple-converted-space> </SPAN></SPAN>
   
9. <SPAN style="WIDOWS: 1; TEXT-TRANSFORM: none; BACKGROUND-COLOR: rgb(245,252,238); TEXT-INDENT: 0px; LETTER-SPACING: normal; DISPLAY: inline !important; FONT: 14px/26px 微软雅黑, Verdana, Arial, Tahoma; WHITE-SPACE: normal; FLOAT: none; COLOR: rgb(51,51,51); WORD-SPACING: 0px; -webkit-text-stroke-width: 0px">        $result   =   $v . $result;<SPAN class=Apple-converted-space> </SPAN></SPAN>
   
10. <SPAN style="WIDOWS: 1; TEXT-TRANSFORM: none; BACKGROUND-COLOR: rgb(245,252,238); TEXT-INDENT: 0px; LETTER-SPACING: normal; DISPLAY: inline !important; FONT: 14px/26px 微软雅黑, Verdana, Arial, Tahoma; WHITE-SPACE: normal; FLOAT: none; COLOR: rgb(51,51,51); WORD-SPACING: 0px; -webkit-text-stroke-width: 0px">    }</SPAN>
    
11. <SPAN style="WIDOWS: 1; TEXT-TRANSFORM: none; BACKGROUND-COLOR: rgb(245,252,238); TEXT-INDENT: 0px; LETTER-SPACING: normal; DISPLAY: inline !important; FONT: 14px/26px 微软雅黑, Verdana, Arial, Tahoma; WHITE-SPACE: normal; FLOAT: none; COLOR: rgb(51,51,51); WORD-SPACING: 0px; -webkit-text-stroke-width: 0px">    return $result;<SPAN class=Apple-converted-space> </SPAN></SPAN>
    
12. <SPAN style="WIDOWS: 1; TEXT-TRANSFORM: none; BACKGROUND-COLOR: rgb(245,252,238); TEXT-INDENT: 0px; LETTER-SPACING: normal; DISPLAY: inline !important; FONT: 14px/26px 微软雅黑, Verdana, Arial, Tahoma; WHITE-SPACE: normal; FLOAT: none; COLOR: rgb(51,51,51); WORD-SPACING: 0px; -webkit-text-stroke-width: 0px">}</SPAN></P>

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什么东西哦，看都看不懂