Whether the php string contains a certain string

When writing a program, you often need to process strings. The most basic thing is to search for strings. To detect whether a string contains a specified string in PHP, you can use the following function

strpos(string,find[,start]);

string: required. Specifies the string to search for.

find: required. Specifies the characters to search for.

start: Optional. Specifies the location from which to start the search.

Example(Recommended learning:PHP programming from entry to proficiency)

explode

Use explode to judge. The PHP judgment string contains the following code:

function checkstr($str){ $needle ='a';//判断是否包含a这个字符 $tmparray = explode($needle,$str); if(count($tmparray)>1){ return true; } else{ return false; } }

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