PHP function strchr() that searches for the first occurrence of a string in another string

Example

Find the first occurrence of "world" in "Hello world!" and return the rest of thestring:

Definition and Usage

strchr() functionSearchfor the first occurrence of a string in another string.

This function is an alias of the strstr() function.

Note: This function is binary safe.

Note: This function is case-sensitive. To perform a case-insensitive search, use thestristr() function.

Syntax

strchr(string,search,before_search);

Parameters	Description
string	Required. Specifies the string to be searched for.
search	Required. Specifies the string to search for. If the argument is a number, searches for characters that match the ASCII value for that number.
before_search	Optional. A Boolean value with a default value of "false". If set to "true", it will return the portion of the string preceding the first occurrence of the search parameter.

Technical Details

更多实例

实例 1

通过 "o" 的 ASCII 值搜索字符串，并返回字符串的其余部分：

实例 2

返回 "world" 第一次出现之前的字符串部分：

函数原型：extern char *strchr(char *str,char character)

参数说明：str为一个字符串的指针，character为一个待查找字符。

所在库名：#include

函数功能：从字符串str中寻找字符character第一次出现的位置。

返回说明：返回指向第一次出现字符character位置的指针，如果没找到则返回NULL。

其它说明：还有一种格式char *strchr( const char *string, int c )，这里字符串是以int型给出的。

实例：

#include #include int main() { char *str="Hello,I am sky2098,I liking programing!"; char character='k' ; //指定一个字符 char *strtemp; strtemp=strchr(str,character); if(strtemp!=NULL) { printf("%s ",strtemp); } else { printf("can not find %c !",strtemp); } return 0; }

在VC++ 6.0编译运行：

注意返回字符串包含我们character字符。

我们把下面定义：

char character='k' ; //指定一个字符

改写成：

int character='k' ; //指定一个字符

也同样能够实现。

In PHP 5.3, the before_search parameter was added.

Return Value:	Returns the remainder of the string (from the match point). Returns FALSE if the searched string is not found.
PHP Version:	4+
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