英[si:k] 美[sik]
vt. Search, explore; pursue, seek; go to or towards...; [waste] inspection
vi. Search , search; look for it
Third person singular: seeks Present participle: seeking Past tense: sought Past participle: sought
php fseek() function syntax
Function: Locate in the open file.
Syntax: fseek(file,offset,whence)
##Parameters:
| Description | |
| Required. Specifies the file to locate in. | |
| Required. Specifies the new position (measured in bytes from the beginning of the file). | |
| Optional. Possible values: SEEK_SET - Set position equal to offset bytes. default. SEEK_CUR - Sets the position to the current position plus offset. SEEK_END - Set the position to the end of the file plus offset (to move to the position before the end of the file, offset must be a negative value). |
Description: This function moves the file pointer forward or backward from the current position to a new position. The new position starts from the beginning of the file. Section measurement. Returns 0 on success; otherwise returns -1. Note that moving to a position after EOF does not produce an error.
php fseek() function example
<?php
$file = fopen("./test.txt","r");
// 输出当前位置
echo ftell($file);
echo "<br>";
// 改变当前位置
fseek($file,"13");
// 再次输出当前位置
echo ftell($file);
?>