PDF 函数
PHP 手册

PDF_info_textline

(PECL pdflib >= 2.1.0)

PDF_info_textline — Perform textline formatting and query metrics

说明

float PDF_info_textline ( resource $pdfdoc , string $text , string $keyword , string $optlist )

Performs textline formatting and queries the resulting metrics.

PDF 函数
PHP 手册