后端开发|php教程
0.00,nbsp,100,38,PHP
后端开发-php教程
在线等，急。PHP替换指定位置的字符串
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$a = ‘36,0.00,0.00,100|37,0.00,0.00,100|38,0.00,0.00,100|39,0.00,0.00,100’;
$b=’38’;
$c=’85’;
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用PHP怎么做一替换。。。
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就是说 当$a中 包含$b中的字数后。 把38，0.00，0.00，100 中的100替换成$c中的数字。
如果$b=‘37’
那么就把37，0.00，0.00，100 中的100替换成$c中的数字。
谢谢各位了
——解决思路———————-
php5.3+ 通过
$a = 36,0.00,0.00,100
------解决思路----------------------
37,0.00,0.00,100
------解决思路----------------------
38,0.00,0.00,100
------解决思路----------------------
39,0.00,0.00,100;
$b=38;
$c=85;
echo preg_replace_callback("/(^
------解决思路----------------------
\
------解决思路----------------------
$b,0.00,0.00,)100/", function($m) use ($c){ return $m[1].$c;}, $a);
36,0.00,0.00,100
——解决思路———————-
37,0.00,0.00,100
——解决思路———————-
38,0.00,0.00,85
——解决思路———————-
39,0.00,0.00,100
