PHP universal detection function collection page 2/3

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// Function name: CheckTelephone($C_telephone)
// Function: determine whether it is a legal phone number
// Parameter: $C_telephone (phone number to be detected)
// Return value: Boolean value
// Note: None
//----------------------------------------------------------------------------------- 
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function CheckTelephone($C_telephone) 
{ 
if (!ereg("^[+]?[0-9]+([xX-][0-9]+)*$", $C_telephone)) return false; 
return true; 
} 
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// Function name: CheckValueBetween($N_var, $N_val1, $N_val2)
// Function: determine whether it is a legal value within a certain range.
// Parameter: $N_var Value to be detected
// $N_var1 Upper limit of the value to be detected
// $N_var2 The lower limit of the value to be detected
// Return value: Boolean value
// Note: None
//----------------------------------------------------------------------------------- 
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function CheckValueBetween($N_var, $N_val1, $N_val2) 
{ 
if ($N_var < $N_var1 ││ $N_var > $N_var2) 
{ 
return false; 
} 
return true; 

} 
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//----------------------------------------------------------------------------------- 
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// Function name: CheckPost($C_post)
// Function: determine whether it is a legal postal code (fixed length)
// Parameter: $C_post (zip code to be checked)
// Return value: Boolean value
// Note: None
//----------------------------------------------------------------------------------- 
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function CheckPost($C_post) 
{ 
$C_post=trim($C_post); 
if (strlen($C_post) == 6) 
{ 
if(!ereg("^[+]?[_0-9]*$",$C_post)) 
{ 
return true;; 
}else 
{ 
return false; 
} 
}else 
{ 
return false;; 
} 
} 
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// Function name: CheckExtendName($C_filename,$A_extend)
// Function: judgment of the extension of uploaded file
// Parameter: $C_filename Uploaded file name
// $A_extend Required extension
// Return value: Boolean value
// Note: None
//----------------------------------------------------------------------------------- 
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function CheckExtendName($C_filename,$A_extend) 
{ 
if(strlen(trim($C_filename)) < 5) 
{ 
return 0; //Return 0 means that the picture was not uploaded.
} 
$lastdot = strrpos($C_filename, "."); //Take it out. The last location
$extended = substr($C_filename, $lastdot+1); //Take out the extension

for($i=0;$i<count($A_extend);$i++)//Check
{ 
if (trim(strtolower($extended)) == trim(strtolower($A_extend[$i]))) //Convert large
Lowercase and detection
{ 
$flag=1; //Add success flag
$i=count($A_extend); //Stop detection when detected
} 
} 

if($flag<>1) 
{ 
for($j=0;$j<count($A_extend);$j++) // List the types of extensions that are allowed to be uploaded
{ 
$alarm .= $A_extend[$j]." "; 
} 
AlertExit('Only upload '.$alarm.' files! And what you upload is a file of type '.$extended.');
return -1; //Return-1 means that the type of uploaded image does not match.
} 

return 1; //Return 1 means that the type of the picture meets the requirements
} 
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//----------------------------------------------------------------------------------- 
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// Function name: CheckImageSize($ImageFileName,$LimitSize)
// Function: Check the size of uploaded pictures
// Parameter: $ImageFileName Uploaded image name
// $LimitSize Required Size
// Return value: Boolean value
// Note: None
//----------------------------------------------------------------------------------- 
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function CheckImageSize($ImageFileName,$LimitSize) 
{ 
$size=GetImageSize($ImageFileName); 
if ($size[0]>$LimitSize[0] ││ $size[1]>$LimitSize[1]) 
{ 
AlertExit('The image is too large');
return false; 
} 
return true; 
} 
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// Function name: Alert($C_alert,$I_goback=0)
// Function: Illegal operation warning
// Parameter: $C_alert (Error message prompted)
//$I_goback (return to that page)
// Return value: string
// Note: None
//----------------------------------------------------------------------------------- 
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function Alert($C_alert,$I_goback=0) 
{ 
if($I_goback<>0) 
{ 
echo "<script>alert('$C_alert');($I_goback);</script>"; 
} 
else 
{ 
echo "<script>alert('$C_alert');</script>"; 
} 
} 
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