如何使用PHP从CSV文件中删除前100行
我有一个定期运行的php脚本，用于处理CSV文件的前100行。完成后，我希望它从CSV文件中删除已处理的行。
我已尝试过以下代码，但它不会删除任何内容。我不确定在PHP中陈述条件的最佳方式，我不确定要为$ id添加什么。为测试目的，我将行数设置为5。可能有错误的语法错误。
有什么建议吗？提示？
function delete_line($id)
{
if($id)
{
$file_handle = fopen("file.csv", "w+");
$myCsv = array();
while (!feof($file_handle) )
{
$line_of_text = fgetcsv($file_handle, 1024);
if ($id != $line_of_text[0])
{
fputcsv($file_handle, $line_of_text);
}
}
fclose($file_handle);
}
}
$in = fopen( 'file.csv', 'r');
$out = fopen( 'file.csv', 'w');
// Check whether they opened
while( $row = fgetcsv( $in, $cnt)){
fputcsv( $out, $row);
}
fclose( $in); fclose( $out);
整个脚本在这里......
<?php
require_once('wp-config.php');
$siteurl = get_site_url();
//print_r($_FILES);
//if($_FILES['file']['tmp_name']) {
//$upload = ABSPATH . 'file.csv';
//move_uploaded_file($_FILES['file']['tmp_name'], $upload);
//}
function clearer($str) {
//$str = iconv("UTF-8", "UTF-8//IGNORE", $str);
$str = utf8_encode($str);
$str = str_replace("’", "'", $str);
$str = str_replace("–", "-", $str);
return htmlspecialchars($str);
}
//file read
if(file_exists("file.csv")) $csv_lines = file("file.csv");
if(is_array($csv_lines)) {
$cnt = 5;
for($i = 0; $i < $cnt; $i++) {
$line = $csv_lines[$i];
$line = trim($line);
$first_char = true;
$col_num = 0;
$length = strlen($line);
for($b = 0; $b < $length; $b++) {
if($skip_char != true) {
$process = true;
if($first_char == true) {
if($line[$b] == '"') {
$terminator = '",';
$process = false;
}else
$terminator = ',';
$first_char = false;
}
if($line[$b] == '"'){
$next_char = $line[$b + 1];
if($next_char == '"')
$skip_char = true;
elseif($next_char == ',') {
if($terminator == '",') {
$first_char = true;
$process = false;
$skip_char = true;
}
}
}
if($process == true){
if($line[$b] == ',') {
if($terminator == ',') {
$first_char = true;
$process = false;
}
}
}
if($process == true)
$column .= $line[$b];
if($b == ($length - 1)) {
$first_char = true;
}
if($first_char == true) {
$values[$i][$col_num] = $column;
$column = '';
$col_num++;
}
}
else
$skip_char = false;
}
}
$values = array_values($values);
//print_r($values);
/*************************************************/
if(is_array($values)) {
//file.csv read
for($i = 0; $i < count($values); $i++) {
unset($post);
//check duplicate
//$wpdb->show_errors();
$wpdb->query("SELECT `ID` FROM `" . $wpdb->prefix . "posts`
WHERE `post_title` = '".clearer($values[$i][0])."' AND `post_status` = 'publish'");
//echo $wpdb->num_rows;
if($values[$i][0] != "Name" && $values[$i][0] != "" && $wpdb->num_rows == 0) {
$post['name'] = clearer($values[$i][0]);
$post['Address'] = clearer($values[$i][1]);
$post['City'] = clearer($values[$i][2]);
$post['Categories'] = $values[$i][3];
$post['Tags'] = $values[$i][4];
$post['Top_image'] = $values[$i][5];
$post['Body_text'] = clearer($values[$i][6]);
//details
for($k = 7; $k <= 56; $k++) {
$values[$i][$k] != '' ? $post['details'] .= "<em>".clearer($values[$i][$k])."</em>\r\n" : '';
}
//cats
$categoryes = explode(";", $post['Categories']);
foreach($categoryes AS $category_name) {
$term = term_exists($category_name, 'category');
if (is_array($term)) {
//category exist
$cats[] = $term['term_id'];
}else{
//add category
wp_insert_term( $category_name, 'category' );
$term = term_exists($category_name, 'category');
$cats[] = $term['term_id'];
}
}
//top image
if($post['Top_image'] != "") {
$im_name = md5($post['Top_image']).'.jpg';
$im = @imagecreatefromjpeg($post['Top_image']);
if ($im) {
imagejpeg($im, ABSPATH.'images/'.$im_name);
$post['topimage'] = '<img class="alignnone size-full" src="'.$siteurl.'/images/'.$im_name.'" alt="" />';
}
}
//bottom images
for($k = 57; $k <= 76; $k++) {
if($values[$i][$k] != '') {
$im_name = md5($values[$i][$k]).'.jpg';
$im = @imagecreatefromjpeg($values[$i][$k]);
if ($im) {
imagejpeg($im, ABSPATH.'images/'.$im_name);
$post['images'] .= '<a href="'.$siteurl.'/images/'.$im_name.'"><img class="alignnone size-full" src="'.$siteurl.'/images/'.$im_name.'" alt="" /></a>';
}
}
}
$post = array_map( 'stripslashes_deep', $post );
//print_r($post);
//post created
$my_post = array (
'post_title' => $post['name'],
'post_content' => '
<em>Address: '.$post['Address'].'</em>
'.$post['topimage'].'
'.$post['Body_text'].'
<!--more-->
'.$post['details'].'
'.$post['images'].'
',
'post_status' => 'publish',
'post_author' => 1,
'post_category' => $cats
);
unset($cats);
//add post
//echo "ID:" .
$postid = wp_insert_post($my_post); //post ID
//tags
wp_set_post_tags( $postid, str_replace(';',',',$post['Tags']), true ); //tags
echo $post['name']. ' - added. ';
//google coords
$address = preg_replace("!\((.*?)\)!si", " ", $post['Address']).', '.$post['City'];
$json = json_decode(file_get_contents('http://hicon.by/temp/googlegeo.php?address='.urlencode($address)));
//print_r($json);
if($json->status == "OK") {
//нашло адрес
$google['status'] = $json->status;
$params = $json->results[0]->address_components;
if(is_array($params)) {
foreach($params AS $id => $p) {
if($p->types[0] == 'locality') $google['locality_name'] = $p->short_name;
if($p->types[0] == 'administrative_area_level_2') $google['sub_admin_code'] = $p->short_name;
if($p->types[0] == 'administrative_area_level_1') $google['admin_code'] = $p->short_name;
if($p->types[0] == 'country') $google['country_code'] = $p->short_name;
if($p->types[0] == 'postal_code') $google['postal_code'] = $p->short_name;
}
}
$google['address'] = $json->results[0]->formatted_address;
$google['location']['lat'] = $json->results[0]->geometry->location->lat;
$google['location']['lng'] = $json->results[0]->geometry->location->lng;
//print_r($params);
//print_r($google);
//insert into DB
$insert_code = $wpdb->insert( $wpdb->prefix . 'geo_mashup_locations',
array( 'lat' => $google['location']['lat'], 'lng' => $google['location']['lng'], 'address' => $google['address'],
'saved_name' => $post['name'], 'postal_code' => $google['postal_code'],
'country_code' => $google['country_code'], 'admin_code' => $google['admin_code'],
'sub_admin_code' => $google['sub_admin_code'], 'locality_name' => $google['locality_name'] ),
array( '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s' )
);
if($insert_code) {
$google_code_id = $wpdb->insert_id;
$geo_date = date( 'Y-m-d H:i:s' );
$wpdb->insert(
$wpdb->prefix . 'geo_mashup_location_relationships',
array( 'object_name' => 'post', 'object_id' => $postid, 'location_id' => $google_code_id, 'geo_date' => $geo_date ),
array( '%s', '%s', '%s', '%s' )
);
}else{
//can't insert data
}
echo ' address added.<br />';
}else{
//echo $json->status;
}
}
} //$values end (for)
}
}else{
//not found file.csv
echo 'not found file.csv';
}
function delete_line($id)
{
if($id)
{
$file_handle = fopen("file.csv", "w+");
$myCsv = array();
while (!feof($file_handle) )
{
$line_of_text = fgetcsv($file_handle, 1024);
if ($id != $line_of_text[0])
{
fputcsv($file_handle, $line_of_text);
}
}
fclose($file_handle);
}
}
$in = fopen( 'file.csv', 'r');
$out = fopen( 'file.csv', 'w');
// Check whether they opened
while( $row = fgetcsv( $in, $cnt)){
fputcsv( $out, $row);
}
fclose( $in); fclose( $out);
?>
更新
我尝试了其中一个答案代码并收到服务器错误。下面的代码，想法？
<?php
require_once('wp-config.php');
$siteurl = get_site_url();
//print_r($_FILES);
//if($_FILES['file']['tmp_name']) {
//$upload = ABSPATH . 'file.csv';
//move_uploaded_file($_FILES['file']['tmp_name'], $upload);
//}
function clearer($str) {
//$str = iconv("UTF-8", "UTF-8//IGNORE", $str);
$str = utf8_encode($str);
$str = str_replace("’", "'", $str);
$str = str_replace("–", "-", $str);
return htmlspecialchars($str);
}
//file read
if(file_exists("file.csv")) $csv_lines = file("file.csv");
if(is_array($csv_lines)) {
$cnt = 5;
for($i = 0; $i < $cnt; $i++) {
$line = $csv_lines[$i];
$line = trim($line);
$first_char = true;
$col_num = 0;
$length = strlen($line);
for($b = 0; $b < $length; $b++) {
if($skip_char != true) {
$process = true;
if($first_char == true) {
if($line[$b] == '"') {
$terminator = '",';
$process = false;
}else
$terminator = ',';
$first_char = false;
}
if($line[$b] == '"'){
$next_char = $line[$b + 1];
if($next_char == '"')
$skip_char = true;
elseif($next_char == ',') {
if($terminator == '",') {
$first_char = true;
$process = false;
$skip_char = true;
}
}
}
if($process == true){
if($line[$b] == ',') {
if($terminator == ',') {
$first_char = true;
$process = false;
}
}
}
if($process == true)
$column .= $line[$b];
if($b == ($length - 1)) {
$first_char = true;
}
if($first_char == true) {
$values[$i][$col_num] = $column;
$column = '';
$col_num++;
}
}
else
$skip_char = false;
}
}
$values = array_values($values);
//print_r($values);
/*************************************************/
if(is_array($values)) {
//file.csv read
for($i = 0; $i < count($values); $i++) {
unset($post);
//check duplicate
//$wpdb->show_errors();
$wpdb->query("SELECT `ID` FROM `" . $wpdb->prefix . "posts`
WHERE `post_title` = '".clearer($values[$i][0])."' AND `post_status` = 'publish'");
//echo $wpdb->num_rows;
if($values[$i][0] != "Name" && $values[$i][0] != "" && $wpdb->num_rows == 0) {
$post['name'] = clearer($values[$i][0]);
$post['Address'] = clearer($values[$i][1]);
$post['City'] = clearer($values[$i][2]);
$post['Categories'] = $values[$i][3];
$post['Tags'] = $values[$i][4];
$post['Top_image'] = $values[$i][5];
$post['Body_text'] = clearer($values[$i][6]);
//details
for($k = 7; $k <= 56; $k++) {
$values[$i][$k] != '' ? $post['details'] .= "<em>".clearer($values[$i][$k])."</em>\r\n" : '';
}
//cats
$categoryes = explode(";", $post['Categories']);
foreach($categoryes AS $category_name) {
$term = term_exists($category_name, 'category');
if (is_array($term)) {
//category exist
$cats[] = $term['term_id'];
}else{
//add category
wp_insert_term( $category_name, 'category' );
$term = term_exists($category_name, 'category');
$cats[] = $term['term_id'];
}
}
//top image
if($post['Top_image'] != "") {
$im_name = md5($post['Top_image']).'.jpg';
$im = @imagecreatefromjpeg($post['Top_image']);
if ($im) {
imagejpeg($im, ABSPATH.'images/'.$im_name);
$post['topimage'] = '<img class="alignnone size-full" src="'.$siteurl.'/images/'.$im_name.'" alt="" />';
}
}
//bottom images
for($k = 57; $k <= 76; $k++) {
if($values[$i][$k] != '') {
$im_name = md5($values[$i][$k]).'.jpg';
$im = @imagecreatefromjpeg($values[$i][$k]);
if ($im) {
imagejpeg($im, ABSPATH.'images/'.$im_name);
$post['images'] .= '<a href="'.$siteurl.'/images/'.$im_name.'"><img class="alignnone size-full" src="'.$siteurl.'/images/'.$im_name.'" alt="" /></a>';
}
}
}
$post = array_map( 'stripslashes_deep', $post );
//print_r($post);
//post created
$my_post = array (
'post_title' => $post['name'],
'post_content' => '
<em>Address: '.$post['Address'].'</em>
'.$post['topimage'].'
'.$post['Body_text'].'
<!--more-->
'.$post['details'].'
'.$post['images'].'
',
'post_status' => 'publish',
'post_author' => 1,
'post_category' => $cats
);
unset($cats);
//add post
//echo "ID:" .
$postid = wp_insert_post($my_post); //post ID
//tags
wp_set_post_tags( $postid, str_replace(';',',',$post['Tags']), true ); //tags
echo $post['name']. ' - added. ';
//google coords
$address = preg_replace("!\((.*?)\)!si", " ", $post['Address']).', '.$post['City'];
$json = json_decode(file_get_contents('http://hicon.by/temp/googlegeo.php?address='.urlencode($address)));
//print_r($json);
if($json->status == "OK") {
//нашло адрес
$google['status'] = $json->status;
$params = $json->results[0]->address_components;
if(is_array($params)) {
foreach($params AS $id => $p) {
if($p->types[0] == 'locality') $google['locality_name'] = $p->short_name;
if($p->types[0] == 'administrative_area_level_2') $google['sub_admin_code'] = $p->short_name;
if($p->types[0] == 'administrative_area_level_1') $google['admin_code'] = $p->short_name;
if($p->types[0] == 'country') $google['country_code'] = $p->short_name;
if($p->types[0] == 'postal_code') $google['postal_code'] = $p->short_name;
}
}
$google['address'] = $json->results[0]->formatted_address;
$google['location']['lat'] = $json->results[0]->geometry->location->lat;
$google['location']['lng'] = $json->results[0]->geometry->location->lng;
//print_r($params);
//print_r($google);
//insert into DB
$insert_code = $wpdb->insert( $wpdb->prefix . 'geo_mashup_locations',
array( 'lat' => $google['location']['lat'], 'lng' => $google['location']['lng'], 'address' => $google['address'],
'saved_name' => $post['name'], 'postal_code' => $google['postal_code'],
'country_code' => $google['country_code'], 'admin_code' => $google['admin_code'],
'sub_admin_code' => $google['sub_admin_code'], 'locality_name' => $google['locality_name'] ),
array( '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s' )
);
if($insert_code) {
$google_code_id = $wpdb->insert_id;
$geo_date = date( 'Y-m-d H:i:s' );
$wpdb->insert(
$wpdb->prefix . 'geo_mashup_location_relationships',
array( 'object_name' => 'post', 'object_id' => $postid, 'location_id' => $google_code_id, 'geo_date' => $geo_date ),
array( '%s', '%s', '%s', '%s' )
);
}else{
//can't insert data
}
echo ' address added.<br />';
}else{
//echo $json->status;
}
}
} //$values end (for)
}
}else{
//not found file.csv
echo 'not found file.csv';
}
function csv_delete_rows($filename='file.csv', $startrow=1, $endrow=5, $inner=false) {
$status = 0;
//check if file exists
if (file_exists($filename)) {
//end execution for invalid startrow or endrow
if ($startrow < 0 || $endrow < 0 || $startrow > 0 && $endrow > 0 && $startrow > $endrow) {
die('Invalid startrow or endrow value');
}
$updatedcsv = array();
$count = 0;
//open file to read contents
$fp = fopen($filename, "r");
//loop to read through csv contents
while ($csvcontents = fgetcsv($fp)) {
$count++;
if ($startrow > 0 && $endrow > 0) {
//delete rows inside startrow and endrow
if ($inner) {
$status = 1;
if ($count >= $startrow && $count <= $endrow)
continue;
array_push($updatedcsv, implode(',', $csvcontents));
}
//delete rows outside startrow and endrow
else {
$status = 2;
if ($count < $startrow || $count > $endrow)
continue;
array_push($updatedcsv, implode(',', $csvcontents));
}
}
else if ($startrow == 0 && $endrow > 0) {
$status = 3;
if ($count <= $endrow)
continue;
array_push($updatedcsv, implode(',', $csvcontents));
}
else if ($endrow == 0 && $startrow > 0) {
$status = 4;
if ($count >= $startrow)
continue;
array_push($updatedcsv, implode(',', $csvcontents));
}
else if ($startrow == 0 && $endrow == 0) {
$status = 5;
} else {
$status = 6;
}
}//end while
if ($status < 5) {
$finalcsvfile = implode("\n", $updatedcsv);
fclose($fp);
$fp = fopen($filename, "w");
fwrite($fp, $finalcsvfile);
}
fclose($fp);
return $status;
} else {
die('File does not exist');
}
}
?>
<html>
<body>
<form enctype="multipart/form-data" method="post">
CSV: <input name="file" type="file" />
<input type="submit" value="Send File" />
</form>
</body>
</html>
2 个答案:
答案 0 :(得分：1)
这是php代码：
$input = explode("\n", file_get_contents("file.csv"));
foreach ($input as $line) {
// process all lines.
}
// This function removes first 100 elements.
// More info:
// http://php.net/manual/en/function.array-slice.php
$output = array_slice($input, 100);
file_put_contents("out.csv", implode("\n", $output));
注意，如果csv文件包含标题，则必须从数组$input中删除第一个元素。
答案 1 :(得分：0)
我在Joby Joseph写的传递中使用了这个脚本：
function csv_delete_rows($filename=NULL, $startrow=0, $endrow=0, $inner=true) {
$status = 0;
//check if file exists
if (file_exists($filename)) {
//end execution for invalid startrow or endrow
if ($startrow < 0 || $endrow < 0 || $startrow > 0 && $endrow > 0 && $startrow > $endrow) {
die('Invalid startrow or endrow value');
}
$updatedcsv = array();
$count = 0;
//open file to read contents
$fp = fopen($filename, "r");
//loop to read through csv contents
while ($csvcontents = fgetcsv($fp)) {
$count++;
if ($startrow > 0 && $endrow > 0) {
//delete rows inside startrow and endrow
if ($inner) {
$status = 1;
if ($count >= $startrow && $count <= $endrow)
continue;
array_push($updatedcsv, implode(',', $csvcontents));
}
//delete rows outside startrow and endrow
else {
$status = 2;
if ($count < $startrow || $count > $endrow)
continue;
array_push($updatedcsv, implode(',', $csvcontents));
}
}
else if ($startrow == 0 && $endrow > 0) {
$status = 3;
if ($count <= $endrow)
continue;
array_push($updatedcsv, implode(',', $csvcontents));
}
else if ($endrow == 0 && $startrow > 0) {
$status = 4;
if ($count >= $startrow)
continue;
array_push($updatedcsv, implode(',', $csvcontents));
}
else if ($startrow == 0 && $endrow == 0) {
$status = 5;
} else {
$status = 6;
}
}//end while
if ($status < 5) {
$finalcsvfile = implode("\n", $updatedcsv);
fclose($fp);
$fp = fopen($filename, "w");
fwrite($fp, $finalcsvfile);
}
fclose($fp);
return $status;
} else {
die('File does not exist');
}
}
该函数接受4个参数：
-
filename（string）：csv文件的路径。例如：
myfile.csv -
startRow（int）：删除区域中的第一行
-
endRow（int）：删除区域的最后一行
-
inner（boolean）：决定删除的行是来自内部区域还是外部区域
现在让我们考虑各种情况。我有一个名为'test.csv'的csv文件。这是相同的截图。
示例1：
$status = csv_delete_rows('test.csv', 3, 5, true);
将删除以下部分的红色部分：
示例2：
$status = csv_delete_rows('test.csv', 3, 5, false);
将删除以下部分的红色部分：
示例3： 与您的情况一样，如果要删除前100行，请使用：
$status = csv_delete_rows('test.csv', 0, 100);
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