正则取字符串
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$str="你好<我>(爱)[北京]{天安门}";
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echo f1($str); //返回你好
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echo f2($str); //返回我
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echo f3($str); //返回爱
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echo f4($str); //返回北京
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echo f5($str); //返回天安门
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function f1($str)
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{
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$result = array();
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preg_match_all("/^(.*)(?:<)/i",$str, $result);
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return $result[1][0];
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}
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function f2($str)
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{
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$result = array();
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preg_match_all("/(?:<)(.*)(?:>)/i",$str, $result);
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return $result[1][0];
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}
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function f3($str)
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{
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$result = array();
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preg_match_all("/(?:\()(.*)(?:\))/i",$str, $result);
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return $result[1][0];
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}
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function f4($str)
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{
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$result = array();
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preg_match_all("/(?:\[)(.*)(?:\])/i",$str, $result);
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return $result[1][0];
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}
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function f5($str)
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{
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$result = array();
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preg_match_all("/(?:\{)(.*)(?:\})/i",$str, $result);
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return $result[1][0];
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}