Home Backend Development PHP Tutorial php统计全部字符在字符串中出现的次数

php统计全部字符在字符串中出现的次数

Jun 13, 2016 am 10:30 AM
array count found str

php统计所有字符在字符串中出现的次数

效果如图



算法:

循环一次字符串(本例的$str),把出现过的字符串记录在一个数组(如本例的$strRecord)内,如果已经此记录函数已经有,则不记录;

在每个字符串时,拿来与记录数组的值进行比较(本例的$strRecord[]['key']),如果记录里的某个值和这个字符串一样,就记录次数+1(本例的$strRecord[]['count']);

当然,设置一个变量,默认为false(如本例的$found),记录每次比较完,如果记录数组已经有这个值,就设置为true,通过这个标记,把没有遇到过的数组记录到数组里

代码:


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